rr625 Noise emission from fastener driving tools · Noise emission from fastener driving tools ......

Executive Health and Safety

Noise emission from fastener driving tools

Prepared by the Health and Safety Laboratoryfor the Health and Safety Executive 2008

RR625 Research Report



Emma Shanks BSc(Hons) MIOA Health and Safety Laboratory Harpur Hill Buxton SK17 9JN

The Supply of Machinery (Safety) Regulations 1992 as amended place duties on machine manufacturers and suppliers to design and construct machinery in such a way that noise emissions are reduced to the lowest level taking account of technical progress and the availability of techniques for reducing noise, particularly at source. There is also a requirement that manufacturers and suppliers provide information on the airborne noise emissions of their products. The Control of Noise at Work Regulations 2005, which came into force in April 2006 implementing the EU Physical Agents (Noise) Directive (2003/10/EC), state that employers may use manufacturers’ tool data to assess the risk to their employees from exposure to noise.

The aims of the work reported here were to:

n Measure the noise emission of the tools supplied by the manufacturers and compare to the manufacturers’ declared emission, if stated.

n Determine whether tools with a declared noise emission have been tested in accordance with the most appropriate test code.

n Comment on the suitability of the noise test methods for the family of tools under test.

n Investigate the link between the manufacturers’ declared emission and the in real use emission.

This project was carried out in conjunction with HSL project JR45.086, an investigation into the correlation between vibration emission and vibration during real use on fastener driving tools as reported in RR591.

This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the author alone and do not necessarily reflect HSE policy.

HSE Books

© Crown copyright 2008

First published 2008

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without the prior written permission of the copyright owner.

Applications for reproduction should be made in writing to:Licensing Division, Her Majesty’s Stationery Office,St Clements House, 2-16 Colegate, Norwich NR3 1BQor by e-mail to [email protected]

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ACKNOWLEDGEMENTS The author gratefully acknowledges those who assisted in this project, in particular the Power Fasteners Association, the tool manufacturers who supplied the tools, and the sites who generously provided us with their time and staff for the field measurements.

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CONTENTS

1 INTRODUCTION......................................................................................... 11.1 Declaration of noise emission.................................................................. 11.2 Outline of work......................................................................................... 11.3 Terminology for emission data................................................................. 11.4 Acoustic parameters ................................................................................ 2

2 TOOLS TESTED......................................................................................... 32.1 Declared emissions ................................................................................. 32.2 Actuation modes ...................................................................................... 4

3 LABORATORY TESTING OF NOISE EMISSION...................................... 63.1 Safety standards / Noise test codes ........................................................ 63.2 Laboratory measurement procedure ....................................................... 63.3 Data acquisition and analysis .................................................................. 83.4 Measured emission results ...................................................................... 8

4 ADDITIONAL LABORATORY TESTS ..................................................... 104.1 Sequential actuation versus ‘bump’ action............................................. 104.2 Tool K auto firing ................................................................................... 11

5 IN REAL USE / FIELD MEASUREMENTS............................................... 145.1 Measurement protocol ........................................................................... 145.2 Data aqusition & analysis ...................................................................... 145.3 Site details ............................................................................................. 145.4 In real use / field results......................................................................... 17

6 DISCUSSION............................................................................................ 196.1 Verification of manufacturers’ declared emission .................................. 196.2 Analysis of HSL measured emission ..................................................... 20

7 CONCLUSIONS........................................................................................ 21

8 APPENDIX A - EQUIPMENT.................................................................... 22

9 APPENDIX B – MEASURED EMISSION RESULTS................................ 23

10 APPENDIX C – ADDITIONAL LABORATORY TEST RESULTS......... 35

11 APPENDIX D – IN REAL USE / FIELD RESULTS ............................... 42

12 REFERENCES ...................................................................................... 47

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EXECUTIVE SUMMARY

Objectives


The aims of the work reported here were to: • Measure the noise emission of the tools supplied by the manufacturers and compare to the

manufacturers’ declared emission, if stated • Determine whether tools with a declared noise emission have been tested in accordance

with the most appropriate test code • Comment on the suitability of the noise test methods for the family of tools under test • Investigate the link between the manufacturers’ declared emission and the in real use

emission

This project was carried out in conjunction with HSL project JR45.086, an investigation into the correlation between vibration emission and vibration during real use on fastener driving tools as reported in NV/06/24.

Main Findings

Where

LpA,1s: A-weighted single-event emission sound pressure level at the workstation (dB)

LWA,1s: A-weighted single-event sound power level (dB)

• The quality of declared airborne noise emission data varied between manufacturers. Two out of the 11 tools used in this project were supplied with inappropriate or clearly erroneous data (Tools C and K respectively). While the Supply of Machinery (Safety) Regulations 1992 as amended, and related transposed standards for the family of tools under consideration, are clear about declaration requirements, the information available with tools is not always consistent or transparent.

• HSL was able to verify the manufacturers’ declared emissions for five of the 11 tools tested for the LWA,1s parameter. A sixth tool (Tool D) verified for the LpA,1s parameter. The two parameters are derived from independent measurements, although they may be made at the same time during the same operation. This could be a flaw in the test method with limited measurement positions not accurately capturing a highly directional noise source.

• Provided all conditions are maintained, the standard laboratory test is repeatable, though not necessarily reproducible for the determination of LpA,1s. If a variable is introduced, for

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example, a change in operator, the uncertainty of measurement can increase beyond the uncertainty value attached to the noise descriptor.

• For the determination of LWA,1s, the standard laboratory test is not sufficiently repeatable or reproducible.

• The actuation mode of the tool (contact, single sequential or full sequential) does not affect the noise emitted from the tool beyond the uncertainty value attached to the noise descriptor.

• The test method described in BS EN 12549:1999 has the potential to distinguish between low and high noise tools even though the tool types covered by the standard are very different. Significantly more field data is required to determine whether users can reliably make use of emission data to identify low or high noise tools in practice. The relationship between the declared emission, laboratory measured emission and the field data could not be determined.

• Field measurements showed that in real use noise emissions may vary by up to 15 dB on a single tool dependent on the process, workpiece and the working environment. Noise from fastener driving tools is likely to be a significant contributor to risk of hearing damage if a person is exposed to more than about 500 events per day (an LpA,1s value in the region of 98 to 100 dB giving an equivalent eight-hour daily personal exposure, LEP,d, of approximately 81 dB). For other tools the risk could be significant after only 100 events per day (an LpA,1s value of 105 dB giving an equivalent LEP,d of approximately 80 dB).

Recommendations

• Alert tool manufacturers to their duties under SM(S)R with regards to provision of airborne noise emission data.

• Advise standards bodies and tool manufacturers that repeatability and reproducibility of declared emissions is not sufficiently high.

• Alert end-users of tools that the declared noise emissions may not sufficiently indicate the risk to the worker.

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1 INTRODUCTION

1.1 DECLARATION OF NOISE EMISSION

The Supply of Machinery (Safety) Regulations 1992 as amended place duties on machine manufacturers and suppliers to design and construct machinery in such a way that noise emissions are reduced to the lowest level taking account of technical progress and the availability of techniques for reducing noise, particularly at source. There is also a requirement that manufacturers and suppliers provide information on the airborne noise emissions of their products. The purpose of declaring such information allows verification of a low noise tool design. Additionally, purchasers and users of machinery are able to make informed choices regarding the safety of a potential purchase. The Control of Noise at Work Regulations 2005, which came into force in April 2006 implementing the EU Physical Agents (Noise) Directive (2003/10/EC), state that employers may use manufacturers’ tool data to assess the risk to their employees from exposure to noise.

Standards have been developed in support of the Machinery Directive that define how noise emission values should be obtained for different machine types. Ideally these standard tests should provide noise emission data that is representative of the expected noise exposure in real use, allow tools of the same type to be compared, and identify low-noise tools, thereby highlighting successful low-noise designs. However in practice it can be difficult to design a standard test that is both based on a realistic operation and which gives repeatable and reproducible results. It is therefore common for standard tests to be based on artificial operations. However in these situations, there is concern that the resultant standard noise emission data may not reflect the noise generated by the tool during normal use. There is therefore a need to evaluate these noise emission standards.

It should be noted that manufacturers are free to follow all, part or none of the safety standards and noise test codes. If such an approach is used, compliance with the regulations is still required with regard to using an appropriate test method, so long as operating conditions etc. are described, and information indicating risk during conditions of intended use is provided.

1.2 OUTLINE OF WORK

The aims of the work reported here were to: • Measure the noise emission of the tools supplied by the manufacturers and compare to the

manufacturers’ declared emission, if stated • Determine whether tools with a declared noise emission have been tested in accordance

with the most appropriate test code • Comment on the suitability of the noise test methods for the family of tool under test • Investigate the link between the manufacturers’ declared emission and the in real use

emission

This project was carried out in conjunction with HSL project JR45.086, an investigation into the correlation between vibration emission and vibration during real use on fastener driving tools as reported in NV/06/24.

1.3 TERMINOLOGY FOR EMISSION DATA

The noise emission data declared by the manufacturer and supplied with the fastener driving tool (where available) is referred to as the “declared emission”.

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1.4

The noise emission measured by HSL in accordance with the requirements of the relevant standard is referred to as the “measured emission”.

ACOUSTIC PARAMETERS

The acoustic parameters used to characterise the noise emissions from fastener driving tools are:

LpA,1s, A-weighted single-event emission sound pressure level in dB: A-weighted and time-integrated emission sound pressure level of an isolated single sound event of specified duration T (or specified measurement time T), related to the reference time of T0 of 1s.

For example: A shot is fired from a fastener driving tool. The duration of the measurement, T, is 5.5 seconds and the sound pressure level over the measurement period, LAeq,T, is 92.6dB. A second shot is fired from the tool. This time the measurement duration is 2.3 seconds and the sound pressure level 96.4dB. It is possible to compare the noise levels of the two shots by normalising the measurement period to 1 second, i.e. calculating the LpA,1s.

LpA,1s = LAeq,T + 10 log (T/T0) dB

For shot 1: LpA,1s = 92.6 +10 log (5.5/1) = 100dB

For shot 2: LpA,1s = 96.4 + 10 log (2.3/1) = 100dB

The LpA,1s from the example fastener driving tool is 100dB.

When only the LpA,1s is known and the number of shots per day or shift can be estimated it is possible to estimate the personal daily exposure level, LEP,d as defined in the Control of Noise at Work Regulations 2005. For the example fastener driving tool, firing 900 shots, over an 8 hour day (28,800 seconds):

LEP,d = LpA,1s + 10 log (number of shots ÷ 28,800) = 85dB

This works because the sound pressure level from the fastener driving tool has been normalised to a 1-second measurement period.

LWA,1s, A-weighted single-event sound power level in dB: A-weighted sound power level determined from measurements of the single-event emission sound pressure level normalised to 1 second.

LpC,peak, C-weighted peak emission sound pressure level in dB: C-weighted peak emission sound pressure level of a test object, determined in accordance with EN ISO 11201 at the work station.

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2.1

2 TOOLS TESTED

Fastener driving tools can be used for a wide range of applications from pallet making to upholstery and picture framing. Tools are available in a wide range of sizes and specifications. The frequency of the driving processes with a fastener driving tool varies in time according to the operation purpose e.g. 500 driving operations per day with a large tool or 20 operations per second with a small tool. The tools used for this project were chosen based on information from the Power Fastenings Association (PFA) regarding the best selling tools of individual manufacturers. The sample of chosen tools is intended to reflect the range of machines encompassed by the standard test, within the limitations of the project, so that resultant information will be useful to as many manufacturers and employers as possible.

DECLARED EMISSIONS

Eleven new tools were obtained for testing: six nailers, three staplers, one bradder and one corrugated fastener. Each tool was supplied with the largest possible fastener intended for use with the tool for the purpose of the standard test. Details of the tools are given in Table 1.

Table 1. Tool details & declared emissions

Tool Power Type HSL Sample No.

Test code / directive quoted

Declared emission, dB LpA,1s KpA,1s LWA,1s KWA,1s

A Gas Strip nailer (large) NV/06/26 EN 792-13:2000 96 4.1* 103 2.5*

B Pneumatic Strip nailer (large) NV/06/35 EN 792-13:2000 89.7 4.1* 97.4 2.5*

C Pneumatic Coil nailer (small) NV/06/34 EN 792-13:2000 82 (LpAImax)# 95 (LWAImax)#

D Pneumatic Coil nailer (small) NV/06/27 EN 12549:1999 88.06+ 94.84+

E Pneumatic Coil nailer (small) NV/06/28 EN 792-13:2000 87.9+ 96+

F Pneumatic Coil nailer (large) NV/06/29 EN 12549 89+ 98.6+

G Pneumatic Heavy wire stapler NV/06/31 EN 792-13:2000 84+ 92+

H Pneumatic Fine wire stapler NV/06/30 prEN 792-13 80 4.1* 85 2.5*

I Pneumatic Bradder NV/06/32 ISO 3744 ISO 11201 85.1 4.1* 94.2 2.5*

J Pneumatic Corrugated fastener NV/06/33 - 87 4.1* 96 2.5* K Pneumatic Fine wire stapler NV/06/37 EN 792-13:2000 68.4+ 75.8+

* These values have been estimated in accordance with BS EN ISO 4871:1997 + These values have been declared as a single number declaration and already include the manufacturer’s K value.

The magnitude of the K value is unknown. # These values were obtained in accordance with DIN 45 635 Teil 66 Mai 1992 and use the noise parameters LpAImax

and LWAImax. The values were requested directly from the manufacturer as the manufacturer’s instruction manual, the EC declaration quoting EN 792-13:2000, did not contain any information regarding the tool’s noise emission. The LpAImax and LWAImax parameters are no longer commonly used to characterise machine or tool noise. The standard from they derive also pre-dates the 1992 Machinery Directive. These values are not suitable for inclusion in any subsequent analysis.

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2.2 ACTUATION MODES

A fastener driving tool may have several modes of operation; this is dependent on the type of trigger fitted to the tool. For the purposes of the laboratory emission testing, tools were operated using sequential actuation. The exceptions were tools H and K. These do not have a safety contact element. The colour of the trigger usually defines the actuation mode in use, although this can be dependent on the individual manufacturer’s colour coding protocol. The most commonly used tool actuation systems with a safety contact element are:

• Contact actuation (also known as ‘bump action’) The safety contact trip and the trigger both have to be actuated but with no order of sequence. The trigger can be depressed and the safety contact element ‘bumped’ against the work piece to cycle the tool. Alternatively, for more precise nail placement, the safety contact element can be placed against the work piece and the trigger pressed.

• Single sequential actuation A system in which the tool may only be operated by observing a sequence of operations. The safety contact element is depressed to the work piece, and the tool is then cycled by depressing the trigger. Repeat cycling can be obtained provided the safety contact element is not removed from the work piece. When the safety element is removed from the work piece, the sequence has to be repeated.

• Full sequential actuation A system in which the safety contact element has to be depressed against the work piece and thereafter the trigger pressed. To drive the next fastener, the safety element has to be removed from the work piece, so that it defaults back to the starting position, and the process repeated for every driving operation.

Figures 1a and 1b show an example of a fastener driving tool. Figures 2a to 2e show examples of different types of fasteners.

Figure 1a. Figure 1b. Compressed air fastener driving tool: 1a showing total view; 1b showing part sectional view.

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Figure 2a. Strip nails Figure 2b. Coiled nails

Figure 2c. Staples Figure 2d. Brads

Figure 2e. Corrugated fasteners

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3 LABORATORY TESTING OF NOISE EMISSION

3.1 SAFETY STANDARDS / NOISE TEST CODES

The current noise emission tests for fastener driving tools are detailed in BS EN 12549:1999 for non-electric tools and BS EN 50144-2-16:2003 for electric tools. Of the 11 tools tested, none were electrically powered so only BS EN 12549:1999 is applicable for this work. This noise test code is referenced from BS EN 792-13:2000, the general safety standard for fastener driving tools. BS EN 12549:1999 references two basic acoustic measurement standards BS EN ISO 3744:1995 and BS EN ISO 11201:1996. Table 2 details the non-electric noise emission test standard hierarchy.

Table 2. Non-electric fastener driving tools standard hierarchy Tool specific safety standard BS EN 792-13:2000 C-type Tool specific noise test code BS EN 12549:1999 C-type

Basic international standards BS EN ISO 3744:1995 BS EN ISO 11201:1996

B-type

Following testing to the correct standard, manufacturers are further required to make dual number tool noise emission declaration in accordance with BS EN ISO 4871:1997.

It should be noted that manufacturers are free to follow all, part or none of the safety standards and noise test codes. If such an approach is used, compliance with the regulations is still required with regard to using an appropriate test method, so long as operating conditions etc. are described, and information indicating risk during conditions of intended use is provided.

3.2 LABORATORY MEASUREMENT PROCEDURE

3.2.1 Sound power level determination, LWA,1s

The A-weighted sound power level was determined by calculation from the measured A-weighted single-event sound pressure levels measured at nine microphone positions around the tool. The measurement surface was a hypothetical cube on which the measurement positions were located and which enveloped the tool. The measurement surface ended at floor level, regarded as the sound reflecting periphery. The height of the centre point of the tool above the ground was 1m ± 0.1m. The centre point was located on the driving axis at half of the height of the tool. The measurement distance was 1m from the centre point of the driving tool. Figures 3a and 3b show the location of the microphone positions for fastener driving tools.

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Figure 3a. From BS EN 12549:1999

5 9

6

O

3

2

Figure 3b. In the anechoic chamber Location of measurement positions 1 to 9 for fastener driving tools. Position O is the measurement location for the A-weighted single-event emission sound pressure level and is not included in the calculation for the LWA,1s (a = 0.3m and h = 0.5m).

The A-weighted single-event sound pressure level of one driving process was measured five times at each measurement position. The arithmetic mean of the five values was determined for each measurement position, normalised to a one second time period. The surface sound pressure level was then calculated using the following equation:

L 9

pA 1, 1, m = log 10 ⎡⎢ 1 ∑ 10 1.0 L ' pA 1 , i s ⎤ ,

⎥ − K1A − K 2 A dBs⎣ 9 i=1 ⎦

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The background noise correction K1A and environmental correction K2A were negligible because testing was carried out in an anechoic test chamber over a reflecting plane.

The A-weighted sound power level was finally calculated using:

LWA 1, s = LpA 1, 1, m + 13 dBs

3.2.2 Emission sound pressure level determination, LpA,1s

The A-weighted single-event emission sound pressure level at the workstation was calculated from the arithmetic mean of five corresponding measurements at microphone position O, each for one driving process, normalised to a one second time period. The location of position O is shown in Figures 3a and 3b.

3.2.3 Workpiece and workpiece support

The workpiece was sawn pinewood, free of knots and with a straight grain. The average bulk density was in the range of 0.42gcm-3 to 0.48gcm-3 and the average wood humidity was 12% ± 3%. For all tools, the thickness of the wood was at least 1.2 times the length of the longest fastener used. The insertion position was at least 50mm from the lateral surfaces of the workpiece.

The workpiece was supported on a bed of dry sand with the grain of the wood in a horizontal direction such that the surface of the workpiece was flush with the top of the sand. The sand bed was 600m (L) x 600m (W) x 400mm (H). The workpiece was surrounded on all lateral surfaces by a sand layer at least 120mm wide.

3.3 DATA ACQUISITION AND ANALYSIS

The measured broadband A-weighted single-event sound pressure levels and the broadband A-weighted single-event emission sound pressure levels were recorded and analysed using a Brüel & Kjær (B&K) Pulse multi-channel real time frequency analyser. This meant that up to 11 channels could be measured simultaneously, allowing the workstation levels at microphone position O to be recorded at the same time as the nine microphone positions on the cuboid measurement surface. Full details of the equipment used are given in Appendix A. Throughout the laboratory emission testing the tool operator for a given tool remained the same for each of the five shots fired for that tool. Where applicable, the compressed air pressure was adjusted for each tool such that the head of the fastener was just below the surface of the workpiece.

3.4 MEASURED EMISSION RESULTS

Table 3 details the measured emission results for each tool tested. All tools were tested in accordance with BS EN 12549:1999 and the results are presented in accordance with BS EN 4871:1997. Full details can be found in Appendix B.

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Table 3. Measured emission results, dB

Tool Air pressure (psi) Operator No. Fastener Workpiece* Measured emission

LpA,1s KpA,1s LWA,1s KWA,1s

A Gas canister 1 90mm D-head nails Large 95.7 4.1 99.9 2.5 B 80 2 90mm plain shank Large 92.6 4.1 99.5 2.5 C 100 1 65mm ring shank Medium 95.7 4.1 105.7 2.5 D 64 1 55mm ring shank Medium 84.6 4.1 95.5 2.5 E 75 1 55mm ring shank Medium 88.2 4.1 98.7 2.5 F 60 1 80mm helical shank Large 87.0 4.1 96.8 2.5 G 70 2 50mm staples Medium 88.7 4.1 95.0 2.5 H 70 1 12mm staples Small 86.3 4.1 89.8 2.5 I 70 2 40mm brads Medium 79.9 4.1 88.7 2.5 J 80 1 12mm corrugated Medium 88.5 4.1 97.1 2.5 K 70 3 10mm staples Small 87.2 4.1 90.5 2.5 * Workpiece dimensions (L x W x D)

Small: 450mm x 205mm x 20mm Medium: 450mm x 120mm x 80mm Large: 450mm x 120mm x 110mm

In accordance with BS EN 12549:1999, the C-weighted peak emission sound pressure level (LpC,peak) at position O was also measured. The results are detailed in Table 4.

Table 4. Measured C-weighted peak emission sound pressure level, dB Tool LpC,peak KpC,peak

A 128.0 2.5 B 119.2 2.5 C 123.8 2.5 D 113.8 2.5 E 116.2 2.5 F 114.0 2.5 G 120.0 2.5 H 121.4 2.5 I 109.8 2.5 J 120.6 2.5 K 122.0 2.5

The K values for all the noise emission descriptors have been calculated in accordance with BS EN 12549:1999.

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4 ADDITIONAL LABORATORY TESTS

4.1 SEQUENTIAL ACTUATION VERSUS ‘BUMP’ ACTION

4.1.1 Measurement method

Tools C, D, E, F and J were capable of ‘bump action’ actuation. The laboratory emission test for these tools was repeated as described in Section 3.2 using first the sequential actuation mode followed by the ‘bump action’ actuation. Repeating the standard emission test gives an indication of the repeatability of the test.

4.1.2 Results

The results for measured emission against ‘bump action’ emission are detailed in Table 5 and Figures 4 and 5. Full details can be found in Appendix C.

Table 5. Measured emission vs ‘bump action’ emission, dB

Tool

LpA,1s LWA,1s

Measured emission

Repeated measured emission

Bump action emission

Measured emission

Repeated measured emission

Bump action emission

C 95.7 99.2 99.4 105.7 106.1 105.5 D 84.6 89.9 87.0 95.5 96.3 94.0 E 88.2 89.3 90.2 98.7 99.9 100.2 F 87.0 91.1 91.9 96.8 98.0 97.8 J 88.5 90.2 90.2 97.1 97.9 97.6

Measured emission (x2) vs 'bump action' emission, LpA,1s

75

80

85

90

95

100

105

pres

sure

leve

l (dB

)A-

wei

ghte

d si

ngle

-eve

nt e

mis

sion

sou

nd

C D E F J

Tool

i ion i ion ion emi ionmeasured em ss repeated measured em ss bump act ss

Figure 4. LpA,1s measured emission vs ‘bump action’ 10

i ion ( i ion, L

90

95

100

105

110

C D E F J

(dB

)

i ion i ion ion emi ion

Measured emss x2) vs 'bump action' emss WA,1s

Tool

A-w

eigh

ted

sing

le-e

vent

sou

nd p

ower

leve

l

measured emss repeated measured emss bump act ss

Figure 5. LWA,1s measured emission vs ‘bump action’

For values of LpA,1s, tools C, E and J are within the uncertainty range of the declared value, KpA,1s, of 4.1dB (maximum for tool C at 3.7dB). Operator 1 was used for the original laboratory measurement as well as the repeat and ‘bump action’ measurements. For tools D and F, operator 1 was used for the original measurements and operator 2 for the repeat and ‘bump action’ measurements. This may account for the larger measurement range (5.3dB for tool C and 4.9dB for tool F). The indication is that the standard laboratory test is repeatable when all conditions are maintained but not necessarily reproducible (change in operator). Any change in the operator location with respect to the single measurement location may affect the amount of shielding or absorption of the direct sound source. It may simply be a case of how the operator holds the tool. All measurements for LpA,1s were made at microphone position O.

For values of LWA,1s, the laboratory measurements are both repeatable and unaffected by the actuation mode of the tool. The maximum range of measurement was 2.3dB on tool D and this is within the uncertainty range of the declared value, KWA,1s, of 2.5dB. Small changes in operator location are evened out over the cuboid measurement surface and nine microphone locations.

4.2 TOOL K AUTO FIRING

As well as single shot firing, Tool K, a small pneumatic fine wire stapler, was also able to auto fire. This is when the trigger is held down and the tool fires fasteners at an operator-defined rate of up to 30 per second until the trigger is released. By recording the number of fasteners fired during the measurement period, it is possible to compare the single shot measured emission to a normalised single shot auto fire emission.

4.2.1 Measurement method

The standard laboratory emission test method was maintained in terms of microphone locations and operators. Instead of firing five single shots and recording each shot individually, five lines

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L

L

of fasteners were fired into a small workpiece (Figure 6). For each line of fasteners the measurement period was recorded and the number of fasters fired was counted.

Figure 6. Tool K auto fire fastener lines

The auto fire emissions were calculated from the following equations:

Sound power level determination

The A-weighted sound pressure level for the firing of a line of fasteners was measured five times at measurement positions 1 to 9 (excluding position O). The arithmetic mean of the five values was determined for each measurement position, normalised to a one second time period and a single shot using the following equation:

⎛⎜⎜

⎞⎟⎟

T − log 10 ( )N dB' i autofire s pA , 1, , =LAeq + log 10

T0⎝ ⎠

where: LAeq,T is the measured sound pressure level over time period T seconds, dB

T0 is the reference time of 1 second

N is the number of fasteners fired over time period T seconds.

The surface sound pressure level was then calculated using the following equation:

9⎡1 ⎤10 1.0 L ' pA 1 , i autofire s , ,∑pA 1, 1, autofire m s , = log 10 −K −K dB⎢⎣

⎥⎦

1A 2 A9 =1

The background noise correction K1A and environmental correction K2A were negligible because testing was carried out in an anechoic test chamber over a reflecting plane.

The A-weighted sound power level is finally calculated from:

i

LWA , 1, autofire s =LpA 1, 1, autofire m s , +13 dB

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Emission sound pressure level

For each line of fasteners: LpA , 1, , Ni autofire s = LAeq + log 10 ⎛⎜⎜ T ⎞

⎟⎟ − log 10 ( ) dB ⎝ T0 ⎠

The arithmetic mean of the results for the five lines is taken as the measured auto fire emission sound pressure level.

4.2.2 Results

Table 6 details the results for the measured emission against the auto fire emission for tool K. Full details may be found in Appendix C.

Table 6. Tool K measured emission vs auto fire emission

Tool LpA,1s LWA,1s

Measured Auto fire Measured Auto fire K 87.2 88.4 90.5 91.4

For both LpA,1s and LWA,1s, the difference between the measured emissions and the auto fire emissions is well within the expected uncertainties in the declared emission values of 4.1dB (KpA,1s) and 2.5dB (KWA,1s).

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5 IN REAL USE / FIELD MEASUREMENTS

5.1 MEASUREMENT PROTOCOL

Following the laboratory emission test stage of the project, the intention was to take the tools to a number of industrial locations where fastener drivers are used for various applications. Finding sites capable of accommodating multiple tools was very difficult as nearly every tool is very application specific. To help overcome this, simulated real data was also obtained in the laboratory. Table 7 details which tools were applicable to which site.

Table 7. Site details Site no. Process Tools

1 Pallet repair B, C, D, E, F 2 Furniture manufacturing including upholstery G, H, K 3 HSL simulated real tacking and fixing A, I, J 4 Pallet manufacturer C, D, E, F

Due to the difficulty in finding sites able to accommodate multiple tools there is a lack of repeated data for tools A, G, H, I, J and K. Tools C, D, E and F were used at two sites. Consequently, results obtained during this stage of the project are presented for information only and will not be used in further analysis, as meaningful conclusions cannot be drawn. Where applicable, background corrections have been applied to the measured values but no further corrections have been made e.g. for environmental conditions. This allows a range of working conditions and resultant levels to be shown.

At each site, the measurement conditions were kept as close as possible to a real work situation with the tools supplied by HSL being substituted for a short period of time for the tools which were normally used in the workplace.

5.2 DATA AQUSITION & ANALYSIS

BS EN ISO 11202:1996 was used as the test method for obtaining in real use emission values. A B&K type 2260 sound level meter was used to record the A-weighted sound pressure level and the C-weighted peak sound pressure level at the operator’s ear. The levels, measurement duration and number of driving processes were noted. From this information it was possible to calculate the field A-weighted single-event emission sound pressure level, LpA,1s,field.

5.3 SITE DETAILS

Table 8 summarises the measurement conditions at each site and whether background corrections were applied to the measured levels. A more detailed explanation follows.

Table 8. Summary of measurement conditions and applied background corrections

Site no. Background correction required Notes on measurement conditions

1 Yes 2m from operator; semi-enclosed workstation. 2 No Open warehouse. 3 No Small room. 4 Yes Close to façade; possible influence from second worker.

14

Site #1 – pallet repair (tools B, C, D, E and F)

At site 1, it was not possible to measure the noise level at the operator’s ear due to on site health and safety restrictions. The sound level meter was set up at a distance of 2m from the operator’s location and at a height of 1.55m. Figure 7 shows the measurement set up.

Operator location

B&K 2260 sound level meter

Figure 7. Site #1 measurement set up

The background noise levels were high relative to the noise level from the tool. The values obtained at this site were corrected for background noise. Of 50 measurements made, 17 could be corrected for background noise. The remaining 33 measurements were discarded. Further corrections have not been made.

Site #2 – furniture manufacture including upholstery (tools G, H and K)

There were no deviations from the measurement procedure at this site. It was noted by the site health and safety advisor that on the day the site was visited that the shift patterns meant there were fewer people than normal on the shop floor. This meant that background noise levels were lower than normal. Figures 8a and 8b show typical measurement conditions and workpiece.

Figure 8a. Frame construction Figure 8b. Typical workpiece for upholstering

Site #3 – HSL simulated real tacking and fixing (tools A, I and J)

The room used for the simulated real testing was small in comparison to a typical work environment where fastener driving tools might be found (warehouse / factory). Figure 9 shows the sample workpieces used during measurement.

15

5mm softwood

19mm softwood moulding

7.5mm MDF (medium density fibre board)

43mm pine

Figure 9. Sample workpiece for simulated real measurement

Site #4 – pallet manufacturer (tools C, D, E and F)

There were no deviations from the measurement procedure at site 4. Two different operations were recorded:

Operation 1. Clenching This is when a section of pallet is constructed on a part metal frame. When the nails are fired through the pallet material, the end of the nail is bent over by the metal plate located underneath (see Figures 10a and 10b). The location of the workstation was flush up against a large warehouse façade.

Bent over nailsMetal runner plates

Figure 10a. Clenching operation Figure 10b. Clenching result

Operation 2. Pallet making

Figure 11 shows the operation of pallet making. Results were obtained from measurement at the operator’s ear. The process of pallet making in this instance was a two-man job. Both workers were firing nails during measurement. The second worker was approximately 1.5m from the operator. The results for this process have not been corrected for the second worker.

16

5.4

Measuring instrumentation

Operator using tool under test

Second worker

Figure 11. Pallet making

IN REAL USE / FIELD RESULTS

Figure 12 shows the range of levels from all the in real use / simulated real measurements. Full details can be found in Appendix D. Table 9 shows the number of measurements made at each site for each tool.

80

85

90

95

100

105

110

L (d

B)

pA,1

s

A B C D E F G H I J K

Tool

Figure 12. Range of results from all in real use / simulated real measurements. Note: Background corrections have been made where applicable (see Table 8).

17

L

L

Table 9. Number of measurements per site Tool Site #1 Site #2 Site #3 Site #4

A - - 4 -B 1 - - -C 2 - - 2 D 3 - - 6 E 6 - - 8 F 5 - - 2 G - 15 - -H - 18 - -I - - 10 -J - - 6 -K - 4 - -

The limited field data gathered suggest that noise from fastener driving tools is likely to be a significant contributor to risk of hearing damage if a person is exposed to more than about 500 events per day. For example, for Tool A the typically highest field LpA,1s values lie between 98 and 100 dB leading to an equivalent eight-hour daily personal exposure, LEP,d, in the region of 81 dB.

Example for Tool A:

⎜⎝

⎛+ log 10 day per events of number

seconds 28,800 ⎞⎟⎠

L=,d EP pA , 1, fields

⎛⎜⎝

500

800,28⎞⎟⎠

99+ log 10 =

= dB 81

For other tools the risk could be significant after only 100 events per day. For example, for Tool J a field LpA,1s was measured at 105 dB.

Example for Tool J:

⎛⎜⎝

log 10 day per events of number seconds 28,800

⎞⎟⎠

L += ,d EP pA , 1, fields

⎛⎜⎝

100

800,28⎞⎟⎠

105+ log 10 =

= dB 80

It should also be noted that it is not necessarily only the tool operator who may be exposed to noise. As shown in Figure 11, some processes involve more than one person; near neighbours to the tool operator(s) will also be exposed to the tool noise.

18

6.1

6 DISCUSSION

VERIFICATION OF MANUFACTURERS’ DECLARED EMISSION

For comparison of measured and declared emission values, BS EN ISO 4871:1997 states that the (laboratory) measured emission must be less than or equal to the declared emission plus the uncertainty value associated with the measurement i.e. Lmeasured ≤ Ldeclared + Kdeclared.

Table 10 shows a comparison of the measured and declared noise emissions for each tool. Tools D, E, F, G and K were declared as a single-number declaration where the manufacturer’s K-value has already been included in the declared value. Therefore for these tools the test of verification is Lmeasured ≤ Ldeclared(including K value). The magnitude of the K-value is unknown. Tools A, B, H, I and J were all declared without a K value. For these tools, the K value has been calculated in accordance with BS EN ISO 4871:1997. Tool C’s declaration has not been used.

Table 10. Verification of declared emissions, dB

Tool Declared Measured Verified

LpA,1s

Declared Measured Verified LWA,1s LpA,1s KpA,1s LpA,1s KpA,1s LWA,1s KWA,1s LWA,1s KWA,1s

A 96 4.1 95.7 4.1 Yes 103 2.5 99.9 2.5 Yes B 89.7 4.1 92.6 4.1 Yes 97.4 2.5 99.5 2.5 Yes C - - 95.7 4.1 - - - 105.7 2.5 -D 88.06 Included 84.6 4.1 Yes 94.84 Included 95.5 2.5 No E 87.9 Included 88.2 4.1 No 96 Included 98.7 2.5 No F 89 Included 87.0 4.1 Yes 98.6 Included 96.8 2.5 Yes G 84 Included 88.7 4.1 No 92 Included 95.0 2.5 No H 80 4.1 86.3 4.1 No 85 2.5 89.8 2.5 No I 85.1 4.1 79.9 4.1 Yes 94.2 2.5 88.7 2.5 Yes J 87 4.1 88.5 4.1 Yes 96 2.5 97.1 2.5 Yes K 68.4 Included 87.2 4.1 No 75.8 Included 90.5 2.5 No

Considering only the LpA,1s, six out of 10 tools are verified (tools A, B, D, F, I and J). If LWA,1s is considered, then tool D is no longer verified leaving five out of 10 tools verified. This anomaly may be attributable to the directional nature of the noise from the tools. There is no link between the LpA,1s and LWA,1s values. The former is an average of five measurements at a single discrete microphone location (position O) whilst the latter is an average of the same five measurements at nine microphone locations (positions 1 to 9) on a hypothetical cube shaped measurement surface. The standard deviation for tool D is small (0.43dB on the LpA,1s and 0.37dB on the LWA,1s).

6.1.1 Tool C’s declared emission

The declaration values for Tool C were requested directly from the manufacturer as the manufacturer’s instruction manual, the EC declaration quoting EN 792-13:2000, did not contain any information regarding the tool’s noise emission. The declared values are in the form of LpAImax and LWAImax and were obtained in accordance with DIN 45 635 Teil 66. The LpAImax and LWAImax parameters are no longer commonly used to characterise machine or noise sources. They also pre-date the 1992 Machinery Directive. The parameters are therefore not suitable for inclusion in data analysis.

19

6.2 ANALYSIS OF HSL MEASURED EMISSION

From Table 1 it is known that the tools tested cover a range of types and sizes of fastener driving machine. Table 11 details which tool belongs to which tool type and size category. Grouping the tools in this manner allows for easier identification of low or high noise designs when considering the measured emission values within the tool groupings e.g. it may be reasonably assumed that a fine wire stapler is likely to have a lower noise emission value than a heavy duty nailer; their applications and tool type are very different and their emission results should not, therefore, be compared on a like-for-like basis. It should also be noted the sample set in this study is small and comparisons are drawn based only on this sample set.

Table 11. Tool groupings according to type and size Tool type Tools in group Large nailers A, B, F Small nailers C, D, E Heavy wire / corrugated fastener G, J Fine wire / bradder H, I, K

Subjectively, the emission data has the potential to identify low and high noise tools. For example, the emission test clearly produces a range of values for the different tool types. Within the categories outlined in Table 11, potential users could come to the conclusion that Tools F and I were 'low noise'. By the same methodology, Tool C could be identified as 'high noise' within its group and 'high noise' within the larger grouping of all nailers.

Furthering the same example, the potential user, when looking at nailers in general, might then also decide that, on the basis of noise emission, use of a smaller nailer might be a better choice than use of a larger nailer. This should in turn lead the potential user to consider whether a change of work process to allow the use of the smaller nailer would be appropriate in order to reduce the risks from workplace noise exposure when using nailing tools.

It should be noted that in order to establish whether, in practice, a user would be right to choose or reject a fastener driving tool on the basis of noise emission data alone, significantly more field data would be required. The relationship between the declared emission, laboratory measured emission and the field data could not be determined.

20

7 CONCLUSIONS

Where

LpA,1s: A-weighted single-event emission sound pressure level at the workstation (dB)

LWA,1s: A-weighted single-event sound power level (dB)

• The quality of declared airborne noise emission data varied between manufacturers. Two out of the 11 tools used in this project were supplied with inappropriate or clearly erroneous data (Tools C and K respectively). While the Supply of Machinery (Safety) Regulations 1992 as amended, and related transposed standards for the family of tools under consideration, are clear about declaration requirements, the information available with tools is not always consistent or transparent.

• HSL was able to verify the manufacturers’ declared emissions for five of the 11 tools tested for the LWA,1s parameter. A sixth tool (Tool D) verified for the LpA,1s parameter. The two parameters are derived from independent measurements, although they may be made at the same time during the same operation. This could be a flaw in the test method with limited measurement positions not accurately capturing a highly directional noise source.

• Provided all conditions are maintained, the standard laboratory test is repeatable, though not necessarily reproducible for the determination of LpA,1s. If a variable is introduced, for example, a change in operator, the uncertainty of measurement can increase beyond the uncertainty value attached to the noise descriptor.

• For the determination of LWA,1s, the standard laboratory test is not sufficiently repeatable or reproducible.

• The actuation mode of the tool (contact, single sequential or full sequential) does not affect the noise emitted from the tool beyond the uncertainty value attached to the noise descriptor.

• The test method described in BS EN 12549:1999 has the potential to distinguish between low and high noise tools even though the tool types covered by the standard are very different. Significantly more field data is required to determine whether users can reliably make use of emission data to identify low or high noise tools in practice. The relationship between the declared emission, laboratory measured emission and the field data could not be determined.

• Field measurements showed that in real use noise emissions may vary by up to 15 dB on a single tool dependent on the process, workpiece and the working environment. Noise from fastener driving tools is likely to be a significant contributor to risk of hearing damage if a person is exposed to more than about 500 events per day (an LpA,1s value in the region of 98 to 100 dB giving an equivalent eight-hour daily personal exposure, LEP,d, of approximately 81 dB). For other tools the risk could be significant after only 100 events per day (an LpA,1s value of 105 dB giving an equivalent LEP,d of approximately 80 dB).

21

8 APPENDIX A - EQUIPMENT

Equipment Serial number

Laboratory emission measurement DELL Latitude Laptop (Pulse 2001) 99123 B&K Pulse 3032A 6/1 ch input/ouput module 2325758 B&K Pulse 3560-B-110 5/1 ch input/output module 2517781 B&K Pulse software version 10.2 B&K Pulse 2001 dongle (6ch) B&K Pulse 2006 dongle (5ch) USB hub LAN switch box

B&K 4190 C1 (microphone position 1) 2510518 B&K 4190 C1 (microphone position 2) 2510519 B&K 4190 C1 (microphone position 3) 2510520 B&K 4190 C1 (microphone position 4) 2510521 B&K 4190 C1 (microphone position 5) 2510522 B&K 4190 C1 (microphone position 6) 2510523 B&K 4190 C1 (microphone position 7) 2510524 B&K 4190 C1 (microphone position 8) 2510525 B&K 4190 C1 (microphone position 9) 2510526 B&K 4190 C1 (microphone position O) 2510527

Real use / field measurement B&K 2260 Investigator 2305154 B&K 4189 microphone 2294166 B&K 4231 calibrator 2309005

22

9 APPENDIX B – MEASURED EMISSION RESULTS

Page 24 Tool A

Page 25 Tool B

Page 26 Tool C

Page 27 Tool D

Page 28 Tool E

Page 29 Tool F

Page 30 Tool G

Page 31 Tool H

Tool I

Page 33 Tool J

Page 34 Tool K

23

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ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

25

Tool

C

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti93

.0

89.6

75

.6

89.1

87

.6

78.4

83

.2

87.9

91

.6

91.2

s

0 0

93.1

89

.8

75.6

89

.2

86.7

78

.2

83.2

88

.1

90.7

91

.2

s 94

.2

90.8

77

.1

90.4

87

.3

79.1

84

.6

89.0

91

.9

92.8

s

94.9

91

.3

77.5

90

.8

87.7

79

.5

85.0

89

.5

92.5

93

.3

s 93

.7

90.3

77

.0

90.2

86

.5

78.2

84

.0

88.2

91

.2

92.4

s

i1

2 3

4 5

6 7

8 9

0 97

.0

93.6

79

.6

93.1

91

.6

82.4

87

.2

91.9

95

.6

95.2

97

.2

93.9

79

.7

93.3

90

.8

82.3

87

.3

92.2

94

.8

95.3

97

.3

93.9

80

.2

93.5

90

.4

82.2

87

.7

92.1

95

.0

95.9

97

.5

93.9

80

.1

93.4

90

.3

82.1

87

.6

92.1

95

.1

95.9

97

.3

93.9

80

.6

93.8

90

.1

81.8

87

.6

91.8

94

.8

96.0

97

.3

93.8

80

.0

93.4

90

.6

82.2

87

.5

92.0

95

.1

95.7

92.7

v

105.

7 i0

LpA,

1s

123.

012

4.0

LpAe

q 12

4.0

124.

012

4.0

(C)

123.

8 (C

)

ii

ii

iA

)i

ii

i

ing

i

ii

ll

65707580859095

1 2

3 4

5 6

7 8

9 0

mi

me

K1

A

K2A

ev

ent 1

dB

(A)

2.48

7 dB

(A)

even

t 2

dB(A

) 2.

593

even

t 3

dB(A

) 2.

048

even

t 4

dB(A

) 1.

828

even

t 5

dB(A

) 2.

268

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.20

0.

16

0.40

0.

26

0.59

0.

24

0.23

0.

20

0.31

0.

38

av s

td d

e0.

29

mic

pos

tion

95.7

dB(

A)

even

t 1

dB(C

) N

max

ev

ent 2

dB

(C)

#NU

M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

26

Tool

D

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti81

.6

79.9

66

.8

79.0

76

.8

69.4

74

.1

76.6

80

.7

80.2

2.

61

s 0

0 83

.8

82.2

68

.8

80.7

78

.4

71.2

75

.2

78.2

82

.0

81.9

s

84.4

82

.2

68.7

81

.4

78.2

70

.7

75.6

78

.3

82.6

82

.2

s 83

.8

82.7

69

.3

80.9

77

.6

70.6

75

.9

78.4

82

.5

82.7

s

83.0

80

.9

67.7

79

.9

77.4

68

.8

74.0

77

.0

81.0

80

.7

s

i1

2 3

4 5

6 7

8 9

0 85

.8

84.1

71

.0

83.2

81

.0

73.6

78

.3

80.8

84

.9

84.4

86

.3

84.7

71

.3

83.2

80

.9

73.7

77

.7

80.7

84

.5

84.4

87

.0

84.8

71

.3

84.0

80

.8

73.3

78

.2

80.9

85

.2

84.8

86

.4

85.3

71

.9

83.5

80

.2

73.2

78

.5

81.0

85

.1

85.3

86

.6

84.5

71

.3

83.5

81

.0

72.4

77

.6

80.6

84

.6

84.3

86

.4

84.7

71

.3

83.5

80

.8

73.2

78

.0

80.8

84

.8

84.6

82.5

v

95.5

i0

LpA,

1s

114.

011

2.0

LpAe

q 11

5.0

114.

011

4.0

(C)

113.

8 (C

)

ii

ii

iA

)i

ii

i

ing

i

ii

ll

65707580859095

1 2

3 4

5 6

7 8

9 0

mi

me

K1

A

K2A

ev

ent 1

dB

(A)

dB(A

) ev

ent 2

dB

(A)

1.75

8 ev

ent 3

dB

(A)

1.82

8 ev

ent 4

dB

(A)

1.81

1 ev

ent 5

dB

(A)

2.26

8

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.46

0.

45

0.33

0.

35

0.33

0.

52

0.41

0.

18

0.33

0.

43

av s

td d

e0.

37

mic

pos

tion

84.6

dB(

A)

even

t 1

dB(C

) N

max

ev

ent 2

dB

(C)

#NU

M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

27

Tool

E

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti89

.1

84.1

70

.2

84.1

82

.1

72.0

77

.3

82.6

84

.0

86.1

s

0 0

90.4

84

.8

70.9

87

.1

83.3

72

.8

79.5

85

.2

85.4

87

.2

s 90

.3

84.7

71

.4

85.7

82

.8

73.4

79

.5

85.1

85

.2

87.4

s

91.7

85

.5

71.2

88

.3

83.9

74

.0

80.2

86

.6

86.2

88

.2

s 91

.3

86.3

71

.5

86.8

83

.6

73.1

79

.7

85.3

86

.6

89.0

s

i1

2 3

4 5

6 7

8 9

0 91

.4

86.4

72

.5

86.4

84

.4

74.3

79

.6

84.9

86

.3

88.4

91

.3

85.7

71

.8

88.0

84

.2

73.7

80

.4

86.1

86

.3

88.1

91

.0

85.4

72

.1

86.4

83

.5

74.1

80

.2

85.8

85

.9

88.1

91

.7

85.5

71

.2

88.3

83

.9

74.0

80

.2

86.6

86

.2

88.2

90

.7

85.7

70

.9

86.2

83

.0

72.5

79

.1

84.7

86

.0

88.4

91

.2

85.7

71

.7

87.0

83

.8

73.7

79

.9

85.6

86

.1

88.2

85.7

v

98.7

i0

LpA,

1s

117.

011

6.0

LpAe

q 11

6.0

116.

011

6.0

(C)

116.

2 (C

)

ii

ii

iA

)i

ii

i

ing

i

ii

ll

65707580859095

1 2

3 4

5 6

7 8

9 0

mi

me

K1

A

K2A

ev

ent 1

dB

(A)

1.67

9 dB

(A)

even

t 2

dB(A

) 1.

222

even

t 3

dB(A

) 1.

169

even

t 4

dB(A

) 0.

9932

ev

ent 5

dB

(A)

0.87

89

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.36

0.

38

0.63

0.

99

0.53

0.

68

0.52

0.

79

0.16

0.

17

av s

td d

e0.

56

mic

pos

tion

88.2

dB(

A)

even

t 1

dB(C

) N

max

ev

ent 2

dB

(C)

#NU

M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

28

Tool

F

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti87

.6

83.2

71

.4

82.9

80

.7

73.5

78

.2

81.1

83

.3

85.8

s

0 0

86.1

82

.2

70.5

82

.9

81.0

71

.2

76.9

80

.7

82.8

84

.5

s 88

.1

82.6

71

.0

83.1

81

.3

73.3

78

.2

81.6

83

.7

85.8

s

90.7

85

.6

73.8

88

.5

85.6

76

.2

81.8

85

.7

88.0

89

.5

s 88

.5

84.2

72

.4

84.1

81

.7

73.9

78

.1

81.7

83

.8

86.0

s

i1

2 3

4 5

6 7

8 9

0 89

.1

84.7

72

.9

84.4

82

.2

75.0

79

.7

82.6

84

.8

87.3

88

.5

84.6

72

.9

85.3

83

.4

73.6

79

.3

83.1

85

.2

86.9

89

.3

83.8

72

.2

84.3

82

.5

74.5

79

.4

82.8

84

.9

87.0

88

.2

83.1

71

.3

86.0

83

.1

73.7

79

.3

83.2

85

.5

87.0

89

.4

85.1

73

.3

85.0

82

.6

74.8

79

.0

82.6

84

.7

86.9

88

.9

84.2

72

.5

85.0

82

.7

74.3

79

.3

82.8

85

.0

87.0

83.8

v

96.8

i0

LpA,

1s

114.

011

4.0

LpAe

q 11

4.0

114.

011

4.0

(C)

114.

0 (C

)

ii

ii

iA

)i

ii

i

ing

i

ii

ll

65707580859095

1 2

3 4

5 6

7 8

9 0

mi

me

K1

A

K2A

ev

ent 1

dB

(A)

1.39

7 dB

(A)

even

t 2

dB(A

) 1.

723

even

t 3

dB(A

) 1.

327

even

t 4

dB(A

) 0.

5625

ev

ent 5

dB

(A)

1.22

2

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.53

0.

78

0.77

0.

70

0.48

0.

63

0.25

0.

29

0.34

0.

16

av s

td d

e0.

53

mic

pos

tion

87.0

dB(

A)

even

t 1

dB(C

) N

max

ev

ent 2

dB

(C)

#NU

M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

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t the

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tion,

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ed fr

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s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

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rivin

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oces

ses

in 1

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max

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Lp

Aeq

= L

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10lo

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s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

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re le

vel o

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EN

ISO

112

01.

Pea

k =

high

est i

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neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

29

Tool

G

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

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1m

LWA

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LpC

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k

1 2

3 4

5 6

7 8

9 0

Ti85

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74.7

80

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83.8

76

.2

71.7

79

.1

80.2

83

.2

88.3

s

0 0

84.2

74

.1

79.5

83

.0

75.6

70

.9

78.1

79

.4

83.1

87

.3

s 83

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73.6

79

.1

82.5

75

.0

71.0

78

.0

79.5

82

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86.2

s

84.6

74

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79.9

83

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75.9

71

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78.4

79

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83.3

87

.5

s 86

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76.2

81

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84.3

77

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72.0

80

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80.8

83

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88.2

s

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2 3

4 5

6 7

8 9

0 85

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75.1

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84.2

76

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72.1

79

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80.6

83

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88.7

85

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75.3

80

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84.2

76

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72.1

79

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80.6

84

.3

88.5

86

.1

75.8

81

.3

84.7

77

.2

73.2

80

.2

81.7

84

.7

88.4

85

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75.7

80

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84.5

76

.9

72.0

79

.4

80.5

84

.3

88.5

87

.0

77.2

82

.5

85.3

78

.1

73.0

81

.0

81.8

84

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89.2

85

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75.8

81

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84.6

77

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72.5

79

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81.1

84

.4

88.7

82.0

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95.0

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327

even

t 3

dB(A

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652

even

t 4

dB(A

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266

even

t 5

dB(A

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266

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.67

0.

82

0.74

0.

45

0.58

0.

55

0.71

0.

64

0.46

0.

33

av s

td d

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mic

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even

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ent 5

dB

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even

t 6

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ent 7

dB

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even

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dB

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Aver

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130

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sson

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sure

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he w

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stat

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LpA

,1s.

Fo

r com

paris

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e va

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give

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nn

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N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

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ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

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eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

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re le

vel o

f the

test

obj

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orks

tatio

n. D

eter

mne

d in

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cord

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wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

30

Tool

H

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

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1m

LWA

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k

1 2

3 4

5 6

7 8

9 0

Ti72

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75.1

67

.7

76.0

72

.0

72.0

75

.0

73.8

76

.9

84.4

s

0 0

73.7

77

.0

69.3

77

.7

74.8

73

.1

76.1

76

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79.2

85

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s 72

.9

75.8

68

.9

75.7

71

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71.7

74

.5

72.4

78

.1

83.4

s

74.6

78

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70.5

77

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73.0

73

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77.3

73

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79.7

85

.3

s 74

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78.0

70

.4

77.1

73

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73.2

76

.1

73.3

78

.4

84.6

s

i1

2 3

4 5

6 7

8 9

0 76

.1

78.7

71

.3

79.6

75

.6

75.6

78

.6

77.4

80

.5

88.0

76

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80.0

72

.3

80.7

77

.8

76.1

79

.1

79.7

82

.2

88.8

74

.0

76.9

70

.0

76.8

72

.9

72.8

75

.6

73.5

79

.2

84.5

74

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78.0

70

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77.8

73

.0

73.2

77

.3

73.8

79

.7

85.3

75

.2

78.5

70

.9

77.6

73

.9

73.7

76

.6

73.8

78

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85.1

75

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78.4

71

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78.5

74

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74.3

77

.4

75.6

80

.1

86.3

76.8

v

89.8

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86.3

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12

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4 (C

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1 2

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K1

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986

even

t 3

dB(A

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283

even

t 4

dB(A

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002

even

t 5

dB(A

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116

mic

pos

tion

even

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even

t 2

even

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even

t 4

even

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Aver

age

std

1.08

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0.87

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59

2.06

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1.43

2.

77

1.32

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92

av s

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) ev

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even

t 4

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ent 5

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Aver

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sson

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,1s.

Fo

r com

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N 2

92-2

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1the

de

term

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n of

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mss

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ound

pr

essu

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tion,

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eq,

shal

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calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

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e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

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orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

31

Tool

I

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

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1m

LWA

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k

1 2

3 4

5 6

7 8

9 0

Ti78

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68.2

72

.3

74.6

70

.4

70.3

71

.2

72.9

76

.1

77.8

s

0 0

78.0

68

.1

72.4

74

.8

70.7

70

.4

71.5

72

.6

76.0

78

.2

s 79

.2

69.3

73

.3

75.7

72

.0

71.0

72

.1

74.1

77

.5

79.4

s

79.1

69

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73.5

76

.0

72.0

71

.2

72.1

73

.6

77.3

78

.7

s 79

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68.8

72

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75.7

71

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71.0

71

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73.6

77

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78.5

s

i1

2 3

4 5

6 7

8 9

0 80

.6

70.4

74

.5

76.8

72

.6

72.5

73

.4

75.1

78

.3

80.0

79

.8

69.9

74

.2

76.6

72

.5

72.2

73

.3

74.4

77

.8

80.0

79

.6

69.7

73

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76.1

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71.4

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.5

74.5

77

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79.8

80

.3

70.4

74

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77.2

73

.2

72.4

73

.3

74.8

78

.5

79.9

80

.3

70.1

74

.0

77.0

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.2

72.3

73

.1

74.9

78

.4

79.8

80

.1

70.1

74

.2

76.7

72

.8

72.2

73

.1

74.7

78

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79.9

75.7

v

88.7

i0

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011

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8 (C

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1 2

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5 6

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9 0

mi

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K1

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K2A

ev

ent 1

dB

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1.66

1 dB

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even

t 2

dB(A

) 1.

503

even

t 3

dB(A

) 1.

107

even

t 4

dB(A

) 1.

327

even

t 5

dB(A

) 1.

336

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.40

0.

31

0.40

0.

41

0.38

0.

42

0.35

0.

29

0.31

0.

10

av s

td d

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mic

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79.9

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A)

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t 1

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M!

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) ev

ent 3

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(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

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Aver

age

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only

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130

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This

s th

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le-e

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sson

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stat

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LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

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eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

32

Tool

J

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti85

.0

80.8

73

.2

80.9

77

.6

71.6

77

.5

78.3

81

.1

84.7

s

0 0

85.9

82

.1

73.8

81

.8

78.4

72

.1

78.3

79

.1

81.5

85

.3

s 85

.2

80.7

72

.4

81.7

78

.3

71.2

77

.4

79.1

80

.7

84.5

s

85.1

81

.3

72.9

81

.0

77.7

71

.4

77.1

77

.8

80.3

84

.2

2.54

s

84.6

80

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72.6

80

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76.6

70

.2

76.9

77

.4

79.5

83

.9

s

i1

2 3

4 5

6 7

8 9

0 89

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84.9

77

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.7

75.7

81

.6

82.4

85

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88.8

89

.7

85.9

77

.6

85.6

82

.2

75.9

82

.1

82.9

85

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89.1

88

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84.3

76

.0

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81

.9

74.8

81

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82.7

84

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88.1

89

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85.3

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.9

85.0

81

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75.4

81

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81.8

84

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88.2

89

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85.1

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85.1

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74.8

81

.5

82.0

84

.1

88.5

89

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85.1

77

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85.2

81

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75.3

81

.5

82.4

84

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88.5

84.1

v

97.1

i0

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1s

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011

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012

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120.

6 (C

)

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65707580859095

1 2

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5 6

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9 0

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K1

A

K2A

ev

ent 1

dB

(A)

2.54

9 dB

(A)

even

t 2

dB(A

) 2.

382

even

t 3

dB(A

) 2.

285

even

t 4

dB(A

) ev

ent 5

dB

(A)

2.87

4

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.32

0.

58

0.60

0.

24

0.36

0.

50

0.42

0.

44

0.54

0.

39

av s

td d

e0.

45

mic

pos

tion

88.5

dB(

A)

even

t 1

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) N

max

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ent 2

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(C)

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M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

33

Tool

K

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti75

.6

78.0

66

.6

75.3

77

.3

74.3

75

.6

76.5

78

.0

85.2

s

0 0

74.7

77

.7

66.1

74

.9

76.7

74

.4

75.6

75

.8

77.0

84

.7

s 74

.4

77.7

65

.9

74.7

76

.7

73.8

75

.4

75.9

77

.4

85.3

s

74.1

77

.8

66.2

75

.1

76.9

73

.4

75.6

75

.7

77.4

85

.3

s 73

.1

77.2

65

.2

73.6

76

.3

73.0

75

.4

74.5

76

.0

85.3

s

i1

2 3

4 5

6 7

8 9

0 76

.4

78.8

67

.4

76.1

78

.1

75.1

76

.4

77.3

78

.8

86.0

76

.6

79.6

68

.0

76.8

78

.6

76.3

77

.5

77.7

78

.9

86.6

76

.3

79.6

67

.8

76.6

78

.6

75.7

77

.3

77.8

79

.3

87.2

76

.0

79.7

68

.1

77.0

78

.8

75.3

77

.5

77.6

79

.3

87.2

76

.6

80.7

68

.7

77.1

79

.8

76.5

78

.9

78.0

79

.5

88.8

76

.4

79.7

68

.0

76.7

78

.8

75.8

77

.5

77.7

79

.2

87.2

77.5

v

90.5

i0

LpA,

1s

121.

012

2.0

LpAe

q 12

2.0

122.

012

3.0

(C)

122.

0 (C

)

ii

ii

iA

)i

ii

i

ing

i

ii

ll

65707580859095

1 2

3 4

5 6

7 8

9 0

mi

me

K1

A

K2A

ev

ent 1

dB

(A)

1.20

4 dB

(A)

even

t 2

dB(A

) 1.

547

even

t 3

dB(A

) 1.

564

even

t 4

dB(A

) 1.

547

even

t 5

dB(A

) 2.

224

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.24

0.

66

0.46

0.

38

0.61

0.

60

0.88

0.

25

0.29

1.

03

av s

td d

e0.

49

mic

pos

tion

87.2

dB(

A)

even

t 1

dB(C

) N

max

ev

ent 2

dB

(C)

#NU

M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

34

10 APPENDIX C – ADDITIONAL LABORATORY TEST RESULTS

Page 36 Tool C

Page 37 Tool D

Page 38 Tool E

Page 39 Tool F

Page 40 Tool J

Page 41 Tool K

35

36

Tool

C -

STD

LpA

eq,T

m

ic p

ositi

on

1 2

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

97.0

93

.9

79.7

93

.9

90.1

83

.5

88.6

92

.7

96.3

ev

ent 2

97

.1

94.4

80

.1

94.8

90

.4

82.9

88

.6

92.8

96

.4

even

t 3

96.8

93

.5

79.4

94

.1

89.5

82

.1

88.2

92

.7

96.4

ev

ent 4

96

.8

93.2

79

.2

94.5

89

.9

82.2

88

.6

92.7

96

.1

even

t 5

97.3

93

.6

80.0

94

.5

89.7

82

.3

88.8

92

.7

96.5

L'

pA,1

s,i

Ave

rage

97

.0

93.7

79

.7

94.3

89

.9

82.6

88

.5

92.7

96

.3

LpA

,1s,

1m

0 93

.1

90.0

75

.8

90.0

79

.6

84.7

88

.8

92.4

2.

435

0 0

96.0

93

.3

79.0

93

.7

87.5

91

.7

95.3

1.

283

94.7

91

.4

77.3

92

.0

86.1

90

.6

94.3

1.

608

94.5

90

.9

76.9

92

.2

86.3

90

.4

93.8

1.

714

93.5

89

.8

76.2

90

.7

85.0

88

.9

92.7

2.

382

0

93.1

il

ii

A)

lsh

all

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

86.2

94

.6

89.3

81

.8

97.9

87

.4

80.0

97

.6

87.6

79

.9

97.2

85

.9

78.5

95

.8

98.5

99

.0

99.7

99

.5

99.6

99

.2

This

s th

e A-

wgt

sin

gle-

even

t em

issi

on

soun

d pr

essu

re le

veat

the

wor

k st

atio

n Lp

A,1

s.

For c

ompa

rson

wth

the

valu

e gi

ven

in

nnex

A, 1

.7.4

(f o

f EN

292

-2:1

991t

he

dete

rmin

atio

n of

the

A-w

gt e

mis

sion

sou

nd

pres

sure

eve

l at t

he w

orks

tatio

n, L

pAeq

, b

e ca

lcul

ated

from

LpA

,1s

by ta

king

106.

1 Lp

A,1

s 99

.2

dB(A

) LW

A,1s

N

max

Lp

Aeq

#N

UM

! dB

(A)

Tool

C -

BU

MP

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

96.1

92

.8

81.8

93

.4

89.1

82

.4

87.1

92

.1

96.2

ev

ent 2

96

.2

93.3

81

.4

93.3

89

.6

82.7

87

.8

91.9

96

.3

even

t 3

96.2

93

.4

81.7

93

.7

89.0

83

.0

88.5

92

.5

96.6

ev

ent 4

95

.4

92.9

81

.8

93.5

88

.8

81.9

87

.7

91.6

95

.7

even

t 5

95.9

93

.1

82.0

94

.3

89.3

82

.3

88.3

92

.0

96.3

L'

pA,1

s,i

Ave

rage

96

.0

93.1

81

.8

93.7

89

.2

82.5

87

.9

92.0

96

.2

LpA

,1s,

1m

92.5

0 93

.9

90.6

79

.6

91.2

80

.2

84.9

89

.9

94.0

0

0 94

.6

91.7

79

.8

91.7

86

.2

90.3

94

.7

1.44

1 94

.3

91.5

79

.8

91.8

86

.6

90.6

94

.7

1.54

7 94

.4

91.9

80

.8

92.5

86

.7

90.6

94

.7

1.26

6 93

.6

90.8

79

.7

92.0

86

.0

89.7

94

.0

1.71

4

0 i

l

ii

A)

lsh

all

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

86.9

96

.6

1.67

88

.0

81.1

97

.6

87.1

81

.1

97.6

87

.8

80.9

98

.6

87.0

80

.0

97.4

98.8

99

.2

99.5

99

.6

99.7

99

.4

This

s th

e A-

wgt

sin

gle-

even

t em

issi

on

soun

d pr

essu

re le

veat

the

wor

k st

atio

n Lp

A,1

s.

For c

ompa

rson

wth

the

valu

e gi

ven

in

nnex

A, 1

.7.4

(f o

f EN

292

-2:1

991t

he

dete

rmin

atio

n of

the

A-w

gt e

mis

sion

sou

nd

pres

sure

eve

l at t

he w

orks

tatio

n, L

pAeq

, b

e ca

lcul

ated

from

LpA

,1s

by ta

king

105.

5 Lp

A,1

s 99

.4

dB(A

) LW

A,1s

N

max

Lp

Aeq

#N

UM

! dB

(A)

37

Tool

D -

STD

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

87.1

76

.9

80.2

84

.3

79.6

72

.2

81.2

82

.1

85.9

ev

ent 2

86

.4

76.9

80

.5

85.4

79

.1

72.9

82

.3

83.5

87

.3

even

t 3

85.7

76

.0

80.9

86

.8

78.7

72

.5

82.8

82

.2

86.7

ev

ent 4

85

.8

77.6

80

.1

86.4

79

.7

72.4

81

.8

83.6

86

.9

even

t 5

86.9

75

.9

81.5

86

.0

79.9

73

.4

82.3

83

.3

88.1

L'

pA,1

s,i

Aver

age

86.4

76

.6

80.6

85

.8

79.4

72

.7

82.1

82

.9

87.0

LpA

,1s,

1m

0 84

.5

77.6

81

.7

69.6

78

.6

85.7

0

0 84

.9

79.0

83

.9

71.4

80

.8

88.3

84

.3

79.5

85

.4

71.1

81

.4

89.0

84

.0

78.3

84

.6

70.6

80

.0

88.0

85

.1

79.7

84

.2

71.6

80

.5

89.7 0

88.3

89.8

90.4

89.8

91.5

89.9

83.3

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

74.3

77

.0

79.5

83

.3

1.82

8 75

.4

77.6

82

.0

85.8

1.

397

74.6

77

.3

80.8

85

.3

1.38

9 75

.8

77.9

81

.8

85.1

1.

503

74.1

78

.1

81.5

86

.3

1.50

3

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

96.3

Lp

A,1

s 89

.9

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

Tool

D -

BU

MP

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

85.5

75

.7

79.4

83

.6

77.8

72

.9

78.7

80

.4

84.2

ev

ent 2

84

.1

74.0

78

.7

82.8

77

.3

72.3

77

.6

80.2

83

.9

even

t 3

85.4

74

.7

79.8

83

.6

77.7

72

.3

78.6

80

.8

84.0

ev

ent 4

84

.6

73.3

78

.5

82.3

76

.7

72.7

78

.7

80.4

84

.2

even

t 5

84.4

73

.6

79.7

83

.6

77.7

72

.5

78.5

81

.5

84.5

L'

pA,1

s,i

Aver

age

84.8

74

.3

79.2

83

.2

77.4

72

.5

78.4

80

.7

84.2

LpA

,1s,

1m

81.0

0 83

.7

77.6

81

.8

71.1

76

.9

84.8

0

0 82

.5

77.1

81

.2

70.7

76

.0

85.3

83

.7

78.1

81

.9

70.6

76

.9

85.1

84

.2

78.1

81

.9

72.3

78

.3

86.7

82

.0

77.3

81

.2

70.1

76

.1

85.3 0

86.6

86.9

86.8

87.1

87.7

87.0

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

73.9

76

.0

78.6

82

.4

1.50

3 72

.4

75.7

78

.6

82.3

1.

441

73.0

76

.0

79.1

82

.3

1.48

5 72

.9

76.3

80

.0

83.8

1.

107

71.2

75

.3

79.1

82

.1

1.72

3

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

94.0

Lp

A,1

s 87

.0

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

38

Tool

E -

STD

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

91.3

88

.7

71.0

87

.9

84.3

75

.1

80.0

86

.5

89.1

ev

ent 2

90

.7

88.5

70

.9

87.7

85

.0

75.4

80

.1

86.5

89

.5

even

t 3

91.2

88

.4

70.8

88

.1

85.6

75

.7

80.6

86

.5

89.3

ev

ent 4

91

.1

89.1

71

.2

88.3

86

.0

76.1

80

.4

86.2

89

.6

even

t 5

91.3

88

.6

71.7

88

.1

85.8

75

.6

80.1

86

.3

88.8

L'

pA,1

s,i

Aver

age

91.1

88

.6

71.1

88

.0

85.3

75

.6

80.2

86

.4

89.2

LpA

,1s,

1m

0 89

.2

68.9

85

.8

73.0

77

.9

87.3

0

0 89

.0

69.2

86

.0

73.7

78

.4

87.4

88

.8

68.4

85

.7

73.3

78

.2

87.0

88

.5

68.6

85

.7

73.5

77

.8

87.2

88

.4

68.8

85

.2

72.7

77

.2

86.2 0

89.4

89.1

89.4

89.8

89.1

89.3

86.9

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

86.6

82

.2

84.4

87

.0

1.60

8 86

.8

83.3

84

.8

87.8

1.

477

86.0

83

.2

84.1

86

.9

1.72

3 86

.5

83.4

83

.6

87.0

1.

828

85.7

82

.9

83.4

85

.9

1.94

2

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

99.9

Lp

A,1

s 89

.3

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

Tool

E -

BU

MP

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

91.2

88

.5

71.5

87

.8

86.1

76

.3

79.9

85

.3

88.4

ev

ent 2

90

.9

88.4

71

.5

87.8

86

.4

75.8

80

.1

86.1

89

.5

even

t 3

91.9

88

.7

72.0

88

.8

86.2

76

.4

80.6

87

.3

90.0

ev

ent 4

91

.3

89.0

71

.7

88.0

86

.2

77.4

80

.5

86.0

89

.7

even

t 5

91.5

90

.1

72.5

88

.9

86.9

78

.0

80.5

86

.7

90.0

L'

pA,1

s,i

Aver

age

91.4

88

.9

71.8

88

.3

86.4

76

.8

80.3

86

.3

89.5

LpA

,1s,

1m

87.2

0 87

.9

68.2

84

.5

73.0

76

.6

86.5

0

0 87

.7

68.3

84

.6

72.6

76

.9

86.7

87

.7

67.8

84

.6

72.2

76

.4

86.2

89

.6

70.0

86

.3

75.7

78

.8

89.1

87

.9

68.9

85

.3

74.4

76

.9

86.7 0

89.8

89.9

90.4

90.8

90.3

90.2

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

85.2

82

.8

82.0

85

.1

2.15

3 85

.2

83.2

82

.9

86.3

2.

109

84.5

82

.0

83.1

85

.8

2.61

87

.3

84.5

84

.3

88.0

1.

477

86.5

83

.3

83.1

86

.4

2.26

8

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

100.

2 Lp

A,1

s 90

.2

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

39

Tool

F -

STD

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

89.3

75

.5

83.0

88

.4

77.1

77

.7

81.9

84

.3

88.0

ev

ent 2

88

.9

75.2

83

.8

88.5

76

.6

77.4

81

.8

83.9

87

.2

even

t 3

88.7

75

.8

84.6

88

.0

77.2

77

.8

82.2

84

.1

87.4

ev

ent 4

89

.2

75.5

84

.7

88.7

76

.8

76.9

82

.2

84.2

87

.2

even

t 5

88.6

75

.2

83.4

88

.8

76.7

77

.5

82.3

83

.9

87.4

L'

pA,1

s,i

Aver

age

88.9

75

.4

83.9

88

.5

76.9

77

.5

82.1

84

.1

87.4

LpA

,1s,

1m

0 87

.0

80.7

86

.1

75.4

79

.6

88.2

0

0 86

.3

81.2

85

.9

74.8

79

.2

87.9

86

.5

82.4

85

.8

75.6

80

.0

89.0

86

.3

81.8

85

.8

74.0

79

.3

89.3

85

.7

80.5

85

.9

74.6

79

.4

88.2 0

90.5

90.5

91.2

92.2

91.1

91.1

85.0

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

73.2

74

.8

82.0

85

.7

1.71

4 72

.6

74.0

81

.3

84.6

1.

828

73.6

75

.0

81.9

85

.2

1.65

2 72

.6

73.9

81

.3

84.3

1.

942

72.3

73

.8

81.0

84

.5

1.93

4

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

98.0

Lp

A,1

s 91

.1

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

Tool

F -

BU

MP

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

87.3

72

.6

84.7

88

.3

75.9

78

.3

82.1

83

.2

88.0

ev

ent 2

87

.2

71.6

83

.1

88.5

74

.4

78.5

82

.8

84.3

88

.0

even

t 3

88.2

73

.1

84.0

88

.2

75.2

79

.2

83.0

84

.5

89.0

ev

ent 4

87

.6

72.8

82

.5

87.8

75

.1

77.6

81

.4

83.4

87

.6

even

t 5

88.4

73

.6

84.1

87

.8

75.4

79

.4

82.7

84

.4

88.6

L'

pA,1

s,i

Aver

age

87.8

72

.8

83.7

88

.1

75.2

78

.6

82.4

84

.0

88.3

LpA

,1s,

1m

84.8

0 84

.0

81.4

85

.0

75.0

78

.8

88.2

0

0 86

.1

82.0

87

.4

77.4

81

.7

90.3

86

.3

82.1

86

.3

77.3

81

.1

90.4

87

.2

82.1

87

.4

77.2

81

.0

91.4

85

.6

81.3

85

.0

76.6

79

.9

89.6 0

91.5

91.4

92.3

91.8

92.4

91.9

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

69.3

72

.6

79.9

84

.7

2.16

2 70

.5

73.3

83

.2

86.9

1.

283

71.2

73

.3

82.6

87

.1

1.56

4 72

.4

74.7

83

.0

87.2

1.

107

70.8

72

.6

81.6

85

.8

1.89

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

97.8

Lp

A,1

s 91

.9

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

40

Tool

J -

STD

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

89.1

85

.1

77.5

84

.6

82.4

78

.4

82.8

82

.3

87.1

ev

ent 2

88

.9

85.8

77

.8

85.0

82

.4

78.6

83

.2

82.6

87

.3

even

t 3

88.8

85

.6

77.3

84

.9

82.6

78

.1

82.6

82

.5

87.1

ev

ent 4

89

.1

85.9

77

.5

85.1

82

.9

78.8

83

.8

82.9

87

.5

even

t 5

89.3

86

.4

77.8

85

.7

83.4

79

.7

84.3

82

.9

88.0

L'

pA,1

s,i

Aver

age

89.1

85

.8

77.6

85

.1

82.8

78

.8

83.4

82

.7

87.4

LpA

,1s,

1m

0 85

.5

73.9

81

.0

74.8

79

.2

86.0

0

0 85

.6

74.5

81

.7

75.3

79

.9

86.6

85

.3

73.8

81

.4

74.6

79

.1

86.1

86

.0

74.4

82

.0

75.7

80

.7

87.5

84

.2

72.7

80

.6

74.6

79

.2

86.1 0

89.6

89.9

89.6

90.6

91.2

90.2

84.9

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

81.5

78

.8

78.7

83

.5

2.31

2 82

.5

79.1

79

.3

84.0

2.

153

82.1

79

.1

79.0

83

.6

2.25

9 82

.8

79.8

79

.8

84.4

2.

048

81.3

78

.3

77.8

82

.9

3.27

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

97.9

Lp

A,1

s 90

.2

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

Tool

J -

BU

MP

LpA

eq,T

m

ic p

ositi

on

12

34

56

78

9

Tim

e

K1A

K2

A

even

t 1

dB(A

) s

dB(A

) ev

ent 2

dB

(A)

sev

ent 3

dB

(A)

sev

ent 4

dB

(A)

sev

ent 5

dB

(A)

s

L'pA

,1s

mic

pos

ition

1

23

45

67

89

even

t 1

88.4

85

.6

78.1

85

.6

82.8

78

.3

83.3

83

.2

87.4

ev

ent 2

88

.0

84.9

77

.1

84.3

83

.1

77.6

82

.9

83.3

86

.6

even

t 3

87.6

85

.0

77.0

84

.5

82.0

77

.3

83.1

83

.6

87.0

ev

ent 4

87

.7

85.3

77

.2

84.7

82

.3

77.6

82

.3

83.2

87

.0

even

t 5

88.8

86

.2

77.2

85

.8

84.3

80

.5

84.6

84

.4

88.8

L'

pA,1

s,i

Aver

age

88.1

85

.4

77.3

85

.0

82.9

78

.2

83.2

83

.5

87.3

LpA

,1s,

1m

84.6

0 86

.2

75.9

83

.4

76.1

81

.1

88.0

0

0 86

.9

76.0

83

.2

76.5

81

.8

88.8

86

.4

75.8

83

.3

76.1

81

.9

88.5

86

.1

75.6

83

.1

76.0

80

.7

88.3

88

.1

76.5

85

.1

79.8

83

.9

90.5 0

90.2

89.9

89.7

89.9

91.2

90.2

ii

ion

ii

iA

)i

ing

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

83.4

80

.6

81.0

85

.2

1.66

1 83

.8

82.0

82

.2

85.5

1.

274

83.8

80

.8

82.4

85

.8

1.32

7 83

.7

80.7

81

.6

85.4

1.

441

85.5

83

.6

83.7

88

.1

1.16

9

This

is th

e A

-wgt

sng

le-e

vent

em

ssso

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

pars

on w

th th

e va

lue

gve

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

inat

ion

of th

e A

-wgt

em

iss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

97.6

Lp

A,1

s 90

.2

dB(A

) LW

A,1

s N

max

LpA

eq

#NU

M!

dB(A

)

Tool

K -

auto

fire

LpA

eq,T

m

ic p

ositi

on

L'pA

,1s

L'pA

,1s,

i

LpA

,1s,

1m

LWA

,1s

LpC

,pea

k

1 2

3 4

5 6

7 8

9 0

Ti90

.1

91.2

82

.5

90.9

90

.2

88.5

90

.8

91.2

91

.5

s 0

0 91

.2

91.4

84

.3

92.1

91

.0

87.7

92

.9

92.6

92

.5

s 88

.8

89.1

81

.8

89.7

87

.1

84.6

88

.5

89.0

89

.8

98.4

s

87.5

89

.2

79.5

87

.5

86.7

86

.2

85.7

85

.9

89.0

95

.9

s 89

.1

89.5

81

.8

87.3

87

.2

85.4

85

.8

85.9

89

.6

96.2

s

i1

2 3

4 5

6 7

8 9

0 79

.7

80.8

72

.1

80.5

79

.8

78.1

80

.4

80.8

81

.1

90.6

79

.9

80.1

73

.0

80.8

79

.7

76.4

81

.6

81.3

81

.2

90.7

78

.2

78.5

71

.2

79.1

76

.5

74.0

77

.9

78.4

79

.2

87.8

78

.8

80.5

70

.8

78.8

78

.0

77.5

77

.0

77.2

80

.3

87.2

78

.6

79.0

71

.3

76.8

76

.7

74.9

75

.3

75.4

79

.1

85.7

79

.0

79.8

71

.7

79.2

78

.1

76.2

78

.4

78.6

80

.2

88.4

78.4

91.4

i0

LpA,

1s

127.

012

9.0

LpAe

q 12

5.0

123.

011

9.0

(C)

124.

6 (C

)

ii

ii

iA

)i

ii

i

ing

i

ii

ll

65707580859095

1 2

3 4

5 6

7 8

9 0

mi

me

K1

A

K2A

ev

ent 1

10

1.0

dB(A

) 3.

981

dB(A

) ev

ent 2

10

2.0

dB(A

) 3.

375

even

t 3

dB(A

) 4.

939

even

t 4

dB(A

) 5.

924

even

t 5

dB(A

) 4.

157

mic

pos

tion

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

Aver

age

std

0.72

0.

99

0.86

1.

59

1.57

1.

72

2.54

2.

46

1.00

2.

18

mic

pos

tion

88.4

dB(

A)

even

t 1

dB(C

) N

max

ev

ent 2

dB

(C)

#NU

M!

dB(A

) ev

ent 3

dB

(C)

even

t 4

dB(C

) ev

ent 5

dB

(C)

even

t 6

dB(C

) ev

ent 7

dB

(C)

even

t 8

dB(C

) ev

ent 9

dB

(C)

even

t 10

dBLp

C,p

eak

Aver

age

dBre

port

only

if >

130

dB

This

s th

e A

-wgt

sng

le-e

vent

em

sson

so

und

pres

sure

leve

l at t

he w

ork

stat

ion

LpA

,1s.

Fo

r com

paris

on w

th th

e va

lue

give

n in

nn

ex A

, 1.7

.4(f

of E

N 2

92-2

:199

1the

de

term

nato

n of

the

A-w

gt e

mss

on s

ound

pr

essu

re le

vel a

t the

wor

ksta

tion,

LpA

eq,

shal

l be

calc

ulat

ed fr

om L

pA,1

s by

tak

into

con

side

ratio

n th

e m

ax p

ossi

ble

num

ber

of d

rivin

g pr

oces

ses

in 1

s, N

max

,1s:

Lp

Aeq

= L

pA,1

s +

10lo

gNm

ax,1

s

This

s th

e ca

lcul

atio

n fo

r the

C-

wgt

pea

k em

issi

on s

ound

pr

essu

re le

vel o

f the

test

obj

ect

at th

e w

orks

tatio

n. D

eter

mne

d in

ac

cord

ance

wth

EN

ISO

112

01.

Pea

k =

high

est i

nsta

neou

s ev

e

L'pA

,1s

100

c po

sitio

n

L'pA,1s [d B(A)]

even

t 1

even

t 2

even

t 3

even

t 4

even

t 5

41

11 APPENDIX D – IN REAL USE / FIELD RESULTS

Page 43 Site 1

Page 44 Site 2

Page 45 Site 3

Page 46 Site 4

42

43

Site

1

even

t 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

L'@

2mA

eq, T

90.6

89

.6

89.3

99

.5

90.6

88

.8

88.9

90

.0

97.1

92

.3

92.3

91

.0

91.9

91

.0

93.7

94

.5

89.7

87

.3

91.9

92

.9

93.7

89

.8

89.6

87

.0

95.8

93

.8

93.8

94

.1

92.8

92

.4

92.1

98

.3

97.9

91

.9

86.1

91

.3

93.8

88

.5

90.0

89

.0

87.5

87

.9

90.1

90

.5

87.8

88

.1

88.3

89

.8

88.8

90

.8

@2m

bk

g 88

.2

88.2

88

.2

88.2

88

.2

88.2

88

.2

88.2

88

.2

88.2

88

.2

88.2

88

.2

88.2

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

89

.7

89.7

T 3 5 5 20 7 12 6 6 8 4 18 13 13 6 8 8 9 8 15

n 3 8 14 17 9 9 6 3 45 10 16 5 12 6 9 12 6 4 18 10 27 6 9 6 33 36 9 18 9 9 12 30 20 18

6 5 12 18 6 3 9 7 12 16

3 6 6 4 4 8

for 2

m

dist

cor

r

4.26

4.

26

4.26

4.

26

4.26

4.

26

4.26

4.

26

4.26

4.

26

4.26

4.

26

4.26

4.

26

5.02

5.

02

3.86

3.

86

3.86

3.

86

3.86

3.

86

3.86

3.

86

3.86

4.

44

4.44

4.

44

4.44

4.

44

4.44

4.

44

4.44

10

.84

10.8

4 10

.84

10.8

4 10

.84

10.8

4 10

.84

10.8

4 10

.84

11.5

4 11

.54

11.5

4 11

.54

11.5

4 11

.54

11.5

4 11

.54

ΔL

2.4

1.4

1.1

11.3

2.

4 0.

6 0.

7 1.

8 8.

9 4.

1 4.

1 2.

8 3.

7 2.

8 4 4.8 0 -2.4

2.

2 3.

2 4 0.1

-0.1

-2

.7

6.1

4.1

4.1

4.4

3.1

2.7

2.4

8.6

8.2

2.2

-3.6

1.

6 4.

1 -1

.2

0.3

-0.7

-2

.2

-1.8

0.

4 0.

8 -1

.9

-1.6

-1

.4

0.1

-0.9

1.

1

bkg

corr

3.

7 5.

6 6.

5 0.

3 3.

7 8.

9 8.

3 4.

7 0.

6 2.

1 2.

1 3.

2 2.

4 3.

2 2.

2 1.

7 #N

UM

! #N

UM

! 4.

0 2.

8 2.

2 16

.4

#NU

M!

#NU

M!

1.2

2.1

2.1

2.0

2.9

3.3

3.7

0.6

0.7

4.0

#NU

M!

5.1

2.1

#NU

M!

11.8

#N

UM

! #N

UM

! #N

UM

! 10

.6

7.7

#NU

M!

#NU

M!

#NU

M!

16.4

#N

UM

! 6.

5

L Aeq

,T

inva

lid

inva

lid

inva

lid10

3.8

inva

lidin

valid

inva

lidin

valid

100.

8 94

.4

94.4

in

valid

93.7

in

valid

96.5

97

.8

inva

lidin

valid

in

valid

93.9

95

.4

inva

lid

inva

lid

inva

lid98

.4

96.1

96

.1

96.6

94

.3

inva

lidin

valid

102.

1 10

1.6

inva

lidin

valid

inva

lid10

2.5

inva

lidin

valid

inva

lidin

valid

inva

lidin

valid

inva

lidin

valid

inva

lidin

valid

inva

lidin

valid

inva

lid

SEL n

#VAL

UE!

#V

ALU

E!

#VAL

UE!

11

0.7

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

113.

8 10

2.9

105.

2 #V

ALU

E!

101.

5 #V

ALU

E!

104.

3 10

6.8

#VAL

UE!

#V

ALU

E!

#VAL

UE!

10

0.0

107.

9 #V

ALU

E!

#VAL

UE!

#V

ALU

E!

109.

6 10

7.2

103.

9 10

5.6

103.

3 #V

ALU

E!

#VAL

UE!

11

1.6

110.

7 #V

ALU

E!

#VAL

UE!

#V

ALU

E!

114.

3 #V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

L 'pA

,1s

#VAL

UE!

#V

ALU

E!

#VAL

UE!

98

.4

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

97.2

92

.9

93.2

#V

ALU

E!

90.7

#V

ALU

E!

94.8

96

.0

#VAL

UE!

#V

ALU

E!

#VAL

UE!

90

.0

93.6

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

94.4

91

.7

94.3

93

.1

93.8

#V

ALU

E!

#VAL

UE!

96

.9

97.6

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

103.

5 #V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

#VAL

UE!

#V

ALU

E!

Tool

F F F F F F F F F F F F F F C C D D D D D D D D D E E E E E E E E B B B B B B B B B G G G G G G G G

L 'pA

,1s -

not c

orre

cted

for d

ista

nce

op#1

94.2

op

#3

op#1

93

.0

op#2

88

.6

88.9

86.5

op#5

89

.7

91.0

op

#1

86.1

op

#4

89.7

op#5

90.5

op

#1

87.2

89

.9

88.6

op

#4

89.4

op#5

92

.4

93.2

op

#1

92.6

op

#5

op#4

op#1

op#4

op#5

mea

sure

men

ts

Lab

posi

tion

5 is

th

e eq

uiva

lent

to

th

e si

te

- wi

The

back

grou

nd n

oise

leve

ls a

t th

is s

ite w

ere

high

rel

ativ

e to

the

nois

e le

vel

from

th

e to

ol.

The

valu

es

obta

ined

w

ere

corr

ecte

d fo

r ba

ckgr

ound

noi

se.

Of

50 m

easu

rem

ents

mad

e,

17 c

ould

be

corr

ecte

d fo

r ba

ckgr

ound

noi

se. T

he r

emai

ning

33

wer

e di

scar

ded.

E

vent

s sh

owin

g ‘#

NU

M!’,

‘In

valid

’ and

‘#VA

LUE

’ are

thos

e m

easu

rem

ents

that

cou

ld n

ot

be c

orre

cted

for b

ackg

roun

d no

ise.

Mea

sure

men

ts a

t thi

s si

te w

ere

mad

e at

a d

ista

nce

of 2

m fr

omth

e to

ol/o

pera

tor

due

to H

&S

res

trict

ions

at

the

site

. It

ispo

ssib

le t

o co

rrec

t fo

r th

e di

stan

ce b

y us

ing

the

labo

rato

ry

mea

sure

men

ts, m

icro

phon

e lo

catio

ns a

nd re

sults

to c

alcu

late

aco

rrect

ion

fact

or.

near

est

mea

sure

men

t. W

e kn

ow th

e va

lues

at p

os 5

. Lab

pos

ition

0 is

th

e w

orks

tatio

n an

d th

e ne

ares

t equ

ival

ent t

o th

e op

erat

ors

ear.

Of

the

5 op

erat

ions

in

the

lab

mea

sure

men

t, ca

lcul

ate

the

aver

age

leve

l at p

os 0

and

the

aver

age

leve

l at p

os 5

. - S

ubtra

ct p

os 5

from

pos

0.

- A

dd t

he r

esul

tant

val

ue t

o th

e 2m

LA

eq,T

(co

rrec

ted

for

bkg

th th

e 2m

bkg

mea

sure

men

t).

Site

2

44

even

t L'

Aeq

, T

bkg

T n

K 3A

Δ

L bk

g co

rr

L Aeq

,T

SEL n

L '

pA,1

s To

ol

2 92

.9

76.5

13

6

0 16

.4

0.1

92.9

10

4.0

96.3

G

3

94.2

76

.5

12

7 0

17.7

0.

1 94

.2

105.

0 96

.5

G

4 93

.5

76.5

6

7 0

17

0.1

93.5

10

1.3

92.8

G

5

92.7

76

.5

30

26

0 16

.2

0.1

92.7

10

7.5

93.3

G

6

96.3

76

.5

19

16

0 19

.8

0.0

96.3

10

9.1

97.0

G

7

95.1

76

.5

11

15

0 18

.6

0.1

95.1

10

5.5

93.8

G

8

92.2

76

.5

16

12

0 15

.7

0.1

92.2

10

4.2

93.4

G

9

92.2

76

.5

12

6 0

15.7

0.

1 92

.2

103.

0 95

.2

G

10

93.0

76

.5

37

19

0 16

.5

0.1

93.0

10

8.7

95.9

G

11

94

.3

76.5

22

12

0

17.8

0.

1 94

.3

107.

7 96

.9

G

12

89.6

76

.5

15

8 0

13.1

0.

2 89

.6

101.

4 92

.3

G

13

88.6

76

.5

15

8 0

12.1

0.

3 88

.6

100.

4 91

.3

G

14

92.1

76

.5

18

7 0

15.6

0.

1 92

.1

104.

7 96

.2

G

15

95.7

76

.5

11

7 0

19.2

0.

1 95

.7

106.

1 97

.7

G

16

91.3

76

.5

23

20

0 14

.8

0.1

91.3

10

4.9

91.9

G

17

89

.4

76.5

10

19

0

12.9

0.

2 89

.4

99.4

86

.6

H

18

97.4

76

.5

9 18

0

20.9

0.

0 97

.4

106.

9 94

.4

H

19

87.3

76

.5

36

85

0 10

.8

0.4

87.3

10

2.9

83.6

H

20

93

.0

76.5

27

80

0

16.5

0.

1 93

.0

107.

3 88

.3

H

21

88.9

76

.5

9 20

0

12.4

0.

3 88

.9

98.4

85

.4

H

22

90.4

76

.5

17

60

0 13

.9

0.2

90.4

10

2.7

84.9

H

23

86

.8

76.5

14

19

0

10.3

0.

4 86

.8

98.3

85

.5

H

24

95.7

76

.5

17

45

0 19

.2

0.1

95.7

10

8.0

91.5

H

25

93

.2

76.5

22

50

0

16.7

0.

1 93

.2

106.

6 89

.6

H

26

90.6

76

.5

38

100

0 14

.1

0.2

90.6

10

6.4

86.4

H

27

88

.6

76.5

11

17

0

12.1

0.

3 88

.6

99.0

86

.7

H

28

89.8

76

.5

62

150

0 13

.3

0.2

89.8

10

7.7

86.0

H

29

89

.8

76.5

26

50

0

13.3

0.

2 89

.8

103.

9 87

.0

H

30

93.7

76

.5

11

40

0 17

.2

0.1

93.7

10

4.1

88.1

H

32

85

.2

62.7

19

23

0

22.5

0.

0 85

.2

98.0

84

.4

H

33

85.9

62

.7

36

55

0 23

.2

0.0

85.9

10

1.5

84.1

H

34

88

.2

62.7

43

65

0

25.5

0.

0 88

.2

104.

5 86

.4

H

35

89.1

62

.7

43

80

0 26

.4

0.0

89.1

10

5.4

86.4

H

36

88

.2

62.7

25

50

0

25.5

0.

0 88

.2

102.

2 85

.2

K 37

88

.6

62.7

17

50

0

25.9

0.

0 88

.6

100.

9 83

.9

K 38

86

.9

62.7

32

45

0

24.2

0.

0 86

.9

102.

0 85

.4

K 39

91

.0

62.7

19

40

0

28.3

0.

0 91

.0

103.

8 87

.8

K

op#1

op#2

op#3

op#1

op#1

op#1

op#1

op#2

op#2

op#2

op#2

op#2

op#2

op#3

op#3

op#3

op#3

op#2

op#2

op#2

op#2

op#2

op#2

op#2

op#2

@ O

PER

ATO

R'S

EA

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fram

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terin

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hols

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terin

g up

hols

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hols

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hols

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hols

terin

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hols

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g

No

corr

ectio

ns re

quire

d, a

nyw

here

, at a

ll!

Site

3

Not

cor

rect

ed fo

r siz

e of

room

45

even

t L'

Aeq

, T

bkg

T n

K 3A

ΔL

bk

g co

rr

L Aeq

,T

SEL

n L '

pA,1

s To

ol

2 98

.0

62.1

37

13

0.

25

35.9

0.

0 97

.8

113.

4 10

2.3

J 3

98.8

62

.1

27

11

0.25

36

.7

0.0

98.6

11

2.9

102.

4 J

4 10

2.0

62.1

15

13

0.

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0.

0 10

1.8

113.

5 10

2.4

J 5

100.

3 62

.1

12

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.2

0.0

100.

1 11

0.8

100.

8 J

6 10

1.1

62.1

14

11

0.

25

39

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9 11

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101.

9 J

7 10

3.5

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11

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41.4

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0 10

3.3

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0 10

4.6

J 8

81.7

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.1

32

12

0.25

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.6

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96

.5

85.7

I

9 83

.4

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25

0.

25

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0 83

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15

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25

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24

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I 17

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25

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0 84

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98.4

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I 18

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.7

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20

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I 19

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83.9

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9

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.1

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.7

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9 0.

19

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0.

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.8

A

op#1

op#2

op#3

op#1

op#2

op#3

op#1

op#2

op#3

op#1

op#2

op#3

L 'pA

,1s

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5 10

2.7

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6 10

1.1

102.

1 10

4.8

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85

.4

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85

.9

85.8

85

.4

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85

.8

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85

.6

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.9

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99

.3

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10

0.0

@ O

PER

ATO

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ine

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ood

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ine

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ize

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st

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king

s ou

t in

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note

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k #2

for

JS20

0498

6.

Site

4

even

t L'

Aeq

, T

bkg

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wal

l ΔL

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rr

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ol

1 99

.5

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3

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0.

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.5

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5 97

.7

D

2 10

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13

30

3

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0.

1 97

.5

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6 93

.9

D

3 10

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81.9

11

30

3

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.3

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7 92

.9

D

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12

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3

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.2

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.2

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.9

12

30

3 18

.7

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3

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0.

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.9

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.1

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94

.6

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24

33

10

.4

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10

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E

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.2

28

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0.

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.4

110.

9 95

.7

E 12

95

.7

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33

36

11

.5

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11

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95.3

E

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84

.2

24

30

11.2

0.

3 95

.4

109.

2 94

.4

D

14

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84

.2

27

33

11.4

0.

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.6

109.

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.7

D

15

93.6

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.2

30

33

9.4

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93.1

10

7.8

92.7

D

17

96

.9

84.2

19

14

12

.7

0.2

96.9

10

9.7

98.2

C

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10

1.7

84.2

27

30

17

.5

0.1

101.

7 11

6.0

101.

2 C

19

99

.0

78.6

24

33

20

.4

0.0

99.0

11

2.8

97.6

F

20

97.6

78

.6

27

33

19

0.1

97.6

11

1.9

96.7

F

Not

cor

rect

ed fo

r ref

lect

ing

plan

e @

OPE

RA

TOR

'S E

AR

op

#1

100.

7 L '

pA,1

s

clen

chin

g; w

orks

tatio

n flu

sh a

gain

st w

all:

refle

cted

sou

nd.

96.9

cl

ench

ing;

wor

ksta

tion

flush

aga

inst

wal

l: re

flect

ed s

ound

. 95

.9

clen

chin

g; w

orks

tatio

n flu

sh a

gain

st w

all:

refle

cted

sou

nd.

98.2

cl

ench

ing;

wor

ksta

tion

flush

aga

inst

wal

l: re

flect

ed s

ound

. 96

.6

clen

chin

g; w

orks

tatio

n flu

sh a

gain

st w

all:

refle

cted

sou

nd.

97.9

cl

ench

ing;

wor

ksta

tion

flush

aga

inst

wal

l: re

flect

ed s

ound

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

. pa

llet m

akin

g; w

ork

in p

airs

so

influ

ence

from

2nd

tool

.

Even

ts 1

, 2, 3

, 5, 6

& 7

hav

e be

en c

orre

cted

for

the

seco

nd r

efle

ctin

g pl

ane.

Cor

rect

ion

appl

ied

= -3

dB.

46

12 REFERENCES

[1] Control of Noise at Work Regulations 2005 Statutory Instrument 2005 No. 1643

[2] EU Physical Agents (Noise) Directive (2003/10/EC)

[3] The Supply of Machinery (Safety) Regulations 1992 (as amended) Statutory Instrument 1992 No. 3073

[4] BS EN 792-13:2000 Hand-held non-electric power tools. Safety requirements. Fastener driving tools.

[5] BS EN 12549:1999 Acoustics. Noise test code for fastener driving tools. Engineering method.

[6] BS EN ISO 3744:1995 Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering method in an essentially free field over a reflecting plane.

[7] BS EN ISO 11201:1996 Acoustics. Noise emitted by machinery and equipment. Measurement of emission sound pressure levels at a work station and at other specified positions. Engineering method in an essentially free field over a reflecting plane.

[8] BS EN ISO 4871:1997 Acoustics. Declaration and verification of noise emission values of machinery and equipment

[9] DIN 45 635 Teil 66 Mai 1992 Geräuschmessung an Maschinen. Luftschallemission, Hüllflächen-Verfahren Tragbare Eintreibgeräte (Measurement of airborne noise emitted by machines; enveloping surface method; fastener driving tools)

[10] BS EN 50144-2-16:2003 Safety of hand-held electric motor operated tools. Particular requirements for tackers.

[11] BS EN ISO 11202:1996 Acoustics. Noise emitted by machinery and equipment. Measurement of emission sound pressure levels at a work station and at other specified positions. Survey method in situ.

[12] NV/06/24 Correlation between vibration emission and vibration during real use: Fastener driving tools

47

Published by the Health and Safety Executive 04/08




The aims of the work reported here were to:

n Measure the noise emission of the tools supplied by the manufacturers and compare to the manufacturers’ declared emission, if stated.

n Determine whether tools with a declared noise emission have been tested in accordance with the most appropriate test code.

n Comment on the suitability of the noise test methods for the family of tools under test.

n Investigate the link between the manufacturers’ declared emission and the in real use emission.

This project was carried out in conjunction with HSL project JR45.086, an investigation into the correlation between vibration emission and vibration during real use on fastener driving tools as reported in RR591.

This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the author alone and do not necessarily reflect HSE policy.

RR625

www.hse.gov.uk

rr625 Noise emission from fastener driving tools · Noise emission from fastener driving tools ......

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