ACOUSTICS DESIGN

AUDIO -VISUAL DESIGN

INDIA . UAE . QATAR

U.A.E PO Box 309137,

1402, BB1 Tower, Mazaya Business Avenue,

Jumeirah Lake Towers, Dubai, UAE

Tel: +971 44519958 Fax: +971 44519968

Email - sriram@sonics.in

INDIA #218, V Floor, JP Royale,

Sampige Road, Malleswaram,

Bangalore – 560003. Telefax: +91 80 23563886

Email - projects@sonics.in

QATAR

PO Box 200091, Salwa Road,

Doha – Qatar

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We are an Acoustics Design & Consultancy firm, formed by a team of enthusiasts with

professional education and sound knowledge in acoustics. With combined hands-on

experience of over 50 years, are completely equipped to up projects in the field of

acoustics design and noise control using scientific methods advanced analysis

tools. We also are members of internationally acclaimed institutions like Institute of

Noise Control Engineers (INCE) and Acousti-

cal Society of India (ASI).

In the Architectural or Building

Acoustics segment we provide

solutions for h o t e l s , b u s i n e s s

p a r k s , auditoriums, seminar halls,

c i n e m a s / multiplexes, open plan offic-

es, etc., for reverberation time con-

trol as well as sound

In the Industrial Acoustics Segment, we

design for Noise and Vibration of

machinery and also design test cells and

anechoic chambers. We designs

and guidelines in accordance Interna-

tional

In the Community Noise segment, we pro-

vide guidelines and design for setting

commercial

spaces highway and airport/aircraft

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MISSION STATEMENT We are committed to provide solutions that

are scientific, eco friendly and optimal, using

professional methods and latest technologies,

fulfilling customer expectations.

STRENGTHS

Independent Consulting 

Technical expertise with academic knowledge

and practical experience

Professional methodology with team approach

Measurement techniques 

IT hardware / connectivity with CAD facilities  

and software skills 

Highest quality of products, systems and  

finishes with detailing that ensures intent and

reality are aligned

Single-source responsibility – acoustics, Au-

dio-Visual, HVAC noise control, tech light-

ing, and stage design for performing ven-

ues.

METHODOLOGY

Master Planning

Schematic Design

Design Development

Construction and Commissioning

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MASTER PLANNING Assessment - List the requirements of

the project Develop the design brief Issue concept planning requirements Develop preliminary schedules Assess external and background noise

levels in one-third octave spectral mode and impact on the proposed de-velopment

Provide acoustic advice on the enve-lope design and building structural requirements, details of room acous-tics

Development of initial report SCHEMATIC DESIGN

Report on ambient noise levels in NC and one-third octave spectral mode

Review concept plans and advise on de-sign requirements in the areas of Architec-tural - wall / ceiling / floors / partitions

Mechanical systems - utilities / venti-lation / hydraulics, etc

Building Material Types, Room Geom-etry

Sound isolation of openings - doors windows / ventilators

Interior finishes

DESIGN DEVELOPMENT

Surface finishes and treatment and the effects

Develop acoustic specifications outlin-ing the requirements for disciplines requiring control to achieve the objectives of the devel-opment

Specifications of acoustic performance criteria for mechanical services

Attend design co-ordination meetings

Provide detailed specifications of all noise control material and or equipment

Provide detailed specifications of HVAC silencer performance, duct velocities, insulation, etc

Provide detailed specifications of the performance levels of the external noise control features

Develop as required detail documentation for construction

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CONSTRUCTION & COMMISSIONING Review contractor’s technical data to check

compliance with previously established performance criteria

Attend design review meetings

Review shop drawings for compliance with acoustic and AV design

Attend witness testing by the trade con-tractors

Undertake acoustic testing for noise vibra-tion, environmental and architectural acoustics, AV systems and issue compliance verification report

Develop final reports, as required, including snag lists

PROJECT CATEGORIES

Design for Hotels and Resorts

Design for Community spaces

Industrial Acoustics & Noise Control

Airport Noise Mapping/Control

Auditoria Acoustics

A/V Design

Stage Lighting System

Stage Curtain System

Studio Acoustics

A/V Design

Stage Lighting System

Office Acoustics

Listening Room \ Home Theatres

Places of Worships

Healthcare Acoustics

Classroom Acoustics

Sports Acoustics

HVAC - AHU Rooms and Ducting—Noise Control

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MEASUREMENT & CONTROL NTi XL2 Class 1

NTi M2211 microphone with preamplifier

Larson Davis LD 824 Class 1 

Acoustics Analyzer with ½” Free Field Microphone and Pre-amplifier  

RTA Spectrum Analyser with wide and narrow band FFT 

Reverberation Time 

Environmental noise measurement 

Signal Generator for room excitation 

Noise Criteria (NC) curves study 

Speech Intelligibility (STI and RASTI)

Community Noise Recording (Leq) measure-ment with data logging

ANALYSIS & DESIGN Advanced Ray-tracing

software

Advanced Noise map-ping

Barrier design

Duct noise and HVAC control

3D CAD software

Simulation & Rendering software

Acoustic calculators for Transmission Loss & insertion loss

 

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SONICS

Organisational Chart

Technical Advisor

Dr. BVA Rao

Management

Sriram BR

Sankarshan S

Sonics – HTC –Doha

Alexander Roshan

Mahimai

Design Team

Vishwanath D.A

Savitha Manjula M

Ajay V Sudhakara

CAD Division Ajay V

Sharan Kumar Ramya

Support Staff

Accounts

Office Executives

Sonics – Infosight –Dubai

Ravi kumar Suresh

Roshan

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Team Sonics:

Completed his Ph.D. from the Technical University, Dresden, Germany in 1961. He

has served as a professor in the Indian Institute of Technology, Chennai, for thirty

years. He is presently the President of Acoustical Society of India and pro- chancellor

of Vellore Engineering College, Vellore.

Netherlands Govt. Fellowship, Technical Eindhoven, Holland

Senior Teaching Fellow, National University of Singapore, Singapore

(Contact – sriram@sonics.in)

A member of Acoustical Society of India, A Mechanical Engineer, with acoustical

studies training in the vibro-acoustics lab of IISc- Bangalore, having professional

experience in the field of Acoustics & Noise Control, has been associated with de-

sign and execution of projects in the field since the year 2000.

Has had professional and expert training in this unique field under the aegis of Prof. M.L. Munjal –

Chairman Mechanical Sciences Division, Indian Institute of Science, Bangalore, and Dr. Ing. B.V.A. Rao

– President, Acoustical Society of India and Prof. (retd.) Indian Institute of Technology. (Both, Prof. Mun-

jal and Prof. B.V.A. Rao continue to provide technical and professional advice and support to our compa-

ny). Has been associated with diverse projects in the field of acoustics and noise control.

(Contact – sankarshan@sonics.in)

A Graduate Mechanical Engineer, with professional experience, since 1997 in the field

of building Acoustics and vibration control, has been associated with design and

execution of Major projects in the field of Acoustics and Vibrations across India,

Middle East and Africa.

With vast field experience, projects and academic interests have taken him to various nations

through which his design inputs and suggestions make our approach and project presentation

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Vishwanath D A - Design Consultant

(Contact vishwanath@sonics.in)

A graduate Electrical Engineer, associated with design and project coordination in Sonics for five

years and has good experience in acoustic simulation softwares, stage and general lighting design

calculations and analysis, HVAC ducting design with respect to noise control and other CAD soft-

wares and is a certified professional in AutoCAD for the year 2010, 2011 and 2012. He has been

involved in different types of projects of in India and overseas.

savita@sonics.in

A Mechanical Engineer, with professional experience in the field of Noise Vibration and

Harshness, has been associated with design and execution of projects in the field of Acoustics

and Vibrations for industries in particular. Has undergone expert training under the aegis of

Prof. M.L. Munjal – Chairman Mechanical Sciences Division, Indian Institute of Science, Ban-

galore, and Dr. Ing. B.V.A. Rao – President , Acoustical Society of India and Prof. (retd.) Indian Institute of Technology.

She has been involved with a number of projects involving Office Acoustics, Machinery noise control, Anechoic Cham-

bers and Test Cells.

Manjula M - Design Consultant

A civil engineer, with a professional experience of over 10 years in architectural acoustics. She

has worked in many prestigious projects in various segments like hospitality, corporate, educa-

tion, retail etc. in India and Middle East.

She is involved in design development and management for acoustics (MEP and architectural),

stage lighting and AV.

Ajay V - Assistant Design Engineer

A civil engineer, associated with design drawings and assists in design, 3D Modelling and analysis

of simulation of acoustical parameters. He is proficient in CAD and other simulation softwares. He

has been involved in different types of projects of in India and overseas.

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Sharan Kumar - Assistant Design Engineer

A Mechanical Engineer, associated with design drawings and assists in 3D Modelling and analysis

of simulation of acoustical parameters. He is proficient in CAD and other simulation software. He

has been involved in different types of projects of in India and overseas.

Ramya R - Assistant Design Engineer

A Civil Engineer, associated with design drawings and assists in 3D Modelling and analysis of sim-

ulation of acoustical parameters. He is proficient in CAD and other simulation software. He has

been involved in different types of projects of in India and overseas.

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LIST OF FEW PRESTIGIOUS PROJECTS

1.Delhi Metro, Autometers Alliance Ltd. – New Delhi, India

2.W-Hotel – Palm Jumeirah, Dubai

3. Qatar academy at Al Khor, Qatar

4. Simulation centre at Hamad Medical City, Qatar

5. Lusail A.2 Mix (UNii engineering consultancy), Qatar

6. Multipurpose Hall, Hotel and complex of Al Najadah Souq, Qatar

7.LinkedIn office, India

8. Boston Scientific Corp. Office, India

9. Boston Consulting Group Office, India

10.Mohammed Bin Rashid Library, Dubai, UAE

11.Kifaf Development, Dubai

12. Vox cinemas, Sharjah

13. Al Ghuweifat Border Post, Abu Dhabi

14. Dubai Hills, Phase—4, Dubai

15. H.E. Sultan Bin Rashid Al Dhaheri Grand Mosque, Al Ain, UAE

16. Hilton Doubletree, Dubai, UAE

17. Hilton DWC, Dubai, UAE

18. Hilton Garden Inn, Al Garhoud, Dubai, UAE

19. American Express Office, India

20. Indian Space Research Organisation, Ahmedabad, India

21. Morgan Stanley Office, India

22. National Centre for Biological Sciences, India

23. Tarek Ibn Ziad School – Doha, Qatar

24. Fountain View Towers – Downtown, Dubai

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LIST OF FEW PRESTIGIOUS PROJECTS

25.Al Zahiya City centre Mall – Sharjah, UAE

26.Fujairah Sports Complex – Fujairah, UAE

27.Dell office, Bangalore - India

28.Shillong Cultural Centre – Meghalaya, India

29.Robinson Night Club – Kolkata, India

30.Basra Cultural Centre – Basra, Iraq

31.Amity University – Academic City, Dubai

32.Myntra Call Centre – Bengaluru, India

33.Ansam, Residential Condominiums – Yas Island, Abu Dhabi

34. Park Inn Hotel—Motor City, Dubai

35. Al Kass & Al Dawri Studios, - Doha, Qatar

37. TCS Banyan Park—Mumbai, India

36. Hilton Double Tree Hotel—Bay Square, Dubai

40. Marriot Hotel—Fujairah, UAE

39. TCS Kalinga Park—Bhubaneshwar, India

38. TCS Sahyadri Park—Pune, India

45. Palace hotel—Downtown, Dubai.

44. GE Medical Systems—Bengaluru, India

43. Deshpande Foundation—Hubli, India

42. Marwadi Engineering College—Rajkot, India

41. Sarla Birla Academy—Bengaluru, India

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Details of a few of our unique projects are shown here -

Delhi Metro Phase – III – 77 stations

Delhi, India

Architects: In house architects - DMRC

Clients: Autometers Alliance Ltd.

Metro is one of the new technology coming up in India for transportation of men and materials from one place to another. In Delhi metro (DMRCL) 77 new stations are simulated for PA system arrangement and its Sound Pressure Level (SPL) by Sonics.

View of operational elevated metro Station Wire frame model of elevated metro Station (Rohini Park)

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Qatar Academy at Al Khor Al Khor, Qatar

Architects: Diwan Al Emara consulting engineers

Clients: Qatar Foundation

This school planned in the city of Al Khor, consists of a main building comprising kindergarten to high school, a recreation centre and a energy centre. The project consists of number of classrooms with varied activity, a multipurpose hall, few public gathering spaces and a big cafeteria.

Rendered view of Qatar Academy

Site Plan view of Qatar Academy

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Simulation Centre at Hamad Medical City Doha, Qatar

Clients: Tehkeef

The project consists of a G+4 building. The scope of work included providing solutions for controlling noise and vibrations of the MEP services equipment in the building.

Rendered view of Simulation centre Rendered view of Simulation centre

Noise and vibration solutions for MEP equipment

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W-Hotel & Residences Palm Jumeirah, Dubai, UAE

Architects: RMJM

Clients: W hotel

This Luxury Resort, situated on the Crescent of the Palm Jumeirah is a world class hotel resort and residential complex with a spa, pool areas, water features and other amenities comprising of approximately 100,000m2 of accommodation including 300 hotel rooms and 45 super luxury duplex, triplex apartments and penthouses.

Sonics is involved as acoustics consultants for the entire project involving internal acoustics and noise control.

Rendered view of W-Hotel

Plan view of W-Hotel Rendered view Entrance Drop of point

Rendered view of W-Hotel

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Tarek Ibn Ziad School Al Sadd, Doha, Qatar

Architects: EHAF consulting engineers

Clients: Private Engineering Office

This school planned in the city of Doha, consists of a kindergarten building, special leaning building and an elementary school building. The project consists of number of classrooms with varied activity, a multipurpose hall, few public gathering spaces and a big cafeteria.

Rendered view of Tarek Ibn Ziad Plan view of Tarek Ibn Ziad (Specialised learning studios)

Sound Transmission Index (STI) of Multipurpose Hall Computer model of Multipurpose Hall

Computer model of cafeteria Sound Transmission Index (STI) of Cafeteria

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Fountain Views Towers Downtown Dubai, Dubai, UAE

Architects: Dewan Architects

Clients: Emaar properties

This 58 storey mixed use project consists of twin residential towers with retail spaces in the shared area. The acoustics design involved building acoustics, noise control and façade design with respect to acoustics.

Rendered view of Fountain Views Towers Rendered view of Fountain Views Towers

Photographic view Photographic view Photographic view

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Al Zahia City centre Dubai, UAE

Interior Designers: Callison

Clients: Majid Al Futtaim (MAF)

This mall is situated in Dubai. The acoustics design involved identifying the noise limits from each tenant, improving speech intelligibility in common spaces like corridors, food courts etc. Advanced ray tracing methods were employed to successfully streamline the acoustics design. The design also included noise and vibration control in the parking spaces and building ser-vices rooms.

Rendered view of Cafeteria Rendered view of Central Atrium

Sound mapping of central atrium Computer model of central atrium

Computer model of cafeteria Sound mapping of cafeteria

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Fujairah Sports Complex Fujairah, UAE

Contractors: Construction and Building Engineering LLC

Clients: Ministry of Public Works

This is a prestigious project in the Emirate of Fujairah with a plan to develop a sports complex with various indoor sports facility and associated offices and studios. The project also includes a 2500 seater multipurpose hall meant for different sports events and at times for musical concerts. The acoustics design has successfully addressed the criteria set for each of the spaces within the building with different options presented for the multipurpose hall to suit the interior design theme.

Rendered View of Fujairah Sports Complex Wire model of Fujairah Sports Complex

Perspective view of Post Sound Transmission Index (STI)

Perspective view of Post Sound Transmission Index (STI)

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Dell -8 Office space

Bangalore, India

Architects: DSP, Bangalore, India.

Clients: Dell India

This 9 story building is a new office being planned in Bangalore, India. This office includes large workspace areas, cafeterias also to be used for organising small events, labs, meeting rooms, conference rooms, video conference rooms and client brief-ing centre. The acoustics design involved drawing criteria for the internal ambient sound levels and speech intelligibility based on the relevant standards and designing wall partitions, façade glazing, and internal absorption panelling.

Rendered view of collaborative spaces

Rendered View of Dell Triple height lobby

Rendered View of Dell Double height Reception Rendered view of cafeteria

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Shillong International Centre for Performing Arts and Culture(SICPAC) Shillong, Meghalaya, India

Architects: Skematic consultants

Clients: Government of Meghalaya

This is a project taken up by the Government of Meghalaya, India to develop an international performing arts centre mainly with 1800 seater auditorium, 800 seater auditorium, 250 seater theatre and a 200 seater hall. We have been involved for the acoustics design of each of the above spaces. The design involves limiting the ambient noise levels, achieving a controllable reverberation time and speech intelligibility with varying application of the hall (music or speech).

Rendered view of Shillong cultural centre Rendered view of Shillong cultural centre

Rendered view of Multipurpose Hall Rendered view of Black Box Theatre

Rendered view of Black Box Theatre Rendered view of Little Theatre

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Robinson Hotel Night Club Kolkata, India

Clients: Robinson Hotel

The project involves designing the wall partitions and glazing for the night club being planned at the 6th floor of the building with hotel suites situated right below the club. The project has been addressed from two perspectives namely – sound and vibration.

Installation of floor at Robinson Hotel Night club Installation of Ceiling at Robinson Hotel Night club

Installation of Anti vibrations on walls

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Basra Cultural Centre Basra, Iraq

Architects: Dewan Architects

Clients: Basra Governorate

The Culture Palace will be built near Shatt Al Basra, within the new administrative complex that also houses the new head-quarters of the Basra Governorate. It will utilise the latest in sound and lighting technology, and conform to contemporary architectural codes of design, efficiency, sustainability, safety and security. However, it will also unmistakably convey Basra's proud heritage and visual legacy, while portraying a bright and prosperous image of the city around it.

Sonics was involved as acoustics consultants for the entire project involving internal acoustics and noise control.

Rendered view of Basra Cultural Centre

Rendered view of Basra Cultural Centre

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Amity University Dubai, UAE

Architects: Arch Group

Clients: Amity University

Sonics was involved as acoustics consultants for the entire project involving internal acoustics and noise control.

Rendered view of Amity University

Rendered view of Amity University

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Myntra Call centre Banagalore, India

Architects: Designtude

Clients: Myntra (A Flipkart Subsidiary)

The acoustics design involved limiting the ambient sound level when the call centre is occupied and limit the cross talk across workstations.

Rendered view of Myntra Reception

Rendered view of Myntra Call Centre work space

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Ansam Yas Island, Abu Dhabi, UAE

Architects: Khatib and Alami

Clients: Aldar properties

Situated on the west side of Yas Island and north-east of the Yas Links Golf Course, Ansam contains low rise, medium density apartments with excellent community facilities and local retail outlets, all integrated with garden style public areas that grant magnificent views of the Yas Links Golf Course.

The acoustics design involved isolating the external traffic noise and limiting noise and vibrations from the building services spaces.

Rendered view of Ansam

Rendered View of Ansam

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ACOUSTICS

Acoustics is the science that deals with the study of sound.

Sound is a vibration, whose frequency, when above 20Hz and up to 20000Hz, is perceived by the human ear as sound. Sound travels as a wave by disturbing the adjacent particles. Sound requires a medium to travel. Sound form a source transmits in a 3-dimensional space like a sphere. The denser the medium, the faster the sound travels. Sound travels faster in steel than in water and faster in water than in air.

Noise is defined as unwanted sound. A constant monotonous sound, like the sound of a die-sel generator or that of drilling, can be classified as noise.

Noise causes physiological changes in the human body that could lead to hearing loss, head-aches, raised blood pressure, cardiovascular effects, stress, etc. It also leads to change in so-cial patterns such as changes in behavioral pattern, loss of communication, lower efficiency and fatigue.

Since sound affects the important and sensitive senses of the human body, it is essential to design the spaces such as residences, offices, factories, hotels, schools and educational insti-tutions for acoustics. It is possible to create a good acoustical atmosphere which leads to good productivity and efficiency.

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Common terminology used in Acoustical Design

STC – Sound Transmission Class - This is as per ASTM standard, a single number depicting the sound attenuation provided by the barrier

Rw – Sound Reduction Index - This is as per ISO Standard, a single number depicting the sound attenuation provided by the barrier

NRC – Noise Reduction Coefficient - This is as per ASTM standard, a single number depict-ing the sound absorption provided by the material

SAA – Sound Absorption Average - This is as per ISO standard, a single number depicting the sound absorption provided by the material

RT - Reverberation Time – The time taken for the sound to reduce by 60dB once the source is switched off.

STI – Speech Transmission Index – This is a measure of speech intelligibility

FSTC –Field Sound Transmission Class – STC measured at site.

Dntw – Field Rw – Rw measured at site

IIC – Impact Insulation class – This is an ASTM standards which gives a single number rating for the impact sound transmitted by the floor/ceiling

Lw – Impact Sound Reduction Index – This is an ISO standard which is similar to IIC

Lntw – Field Impact Sound Reduction – Lw measured at site

SPL – Sound Pressure Level measured in dB

dB – ‘Bel’ is the unit of sound measurement. dB is decibel 1/10th of Bel.

dBA – A weighted sound pressure level

dBC – C weighted sound pressure level

NC – Noise Criterion – this is a standard curve measured across the octave band frequencies to describe the allowed background sound levels inside a space with the HVAC services run-ning.

NR – Noise Rating – same as NC

CAC – Ceiling Attenuation Class – the sound insulation offered by the false ceiling material

Leq – Equivalent Sound Level – This is an average sound level measured at a place over a pe-riod of time and is measured in dB

LAeq – A weighted Leq.

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Importance of Acoustical Design in Educational Institutions

Class rooms & Lecture Halls – since this is the space where learning happens, the acous-tics of the space has to be very good to make it less stressful for the students to listen and understand what is being taught. It is also eases the stress on the teacher, thus vastly im-proving the overall learning experience. The design includes –

Internal room wall paneling and false ceiling to attain the optimum STI Designing the room partition walls, windows and doors to ensure good sound insu-lation.

Auditoriums & Seminar Halls – this space is used for multi-purpose activities, such as, large seminars, demonstrations and cultural activities. The acoustics of the space place a vital role in ensuring the speech and music is heard and understood. The Design includes -

Internal room wall paneling and false ceiling to attain the optimum RT & STI Designing the room partition walls, windows and doors to ensure good sound insu-lation. Specifying the right type of loudspeakers and its placement.

Library – this space is a silent zone. External sounds and noise must be stopped from en-tering the space, thus ensuring the tranquility of the space is not disturbed. The design includes –

Designing the room partition walls, windows and doors to ensure good sound insu-lation.

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Importance of Acoustical Design in Hotels

Guest Rooms – for the guests to feel com-fortable in the room, external noises from adjacent rooms, corridor movements, noise of movement from above, music from pubs and restaurants and also from the traffic outside should be controlled. The Design Includes –

Designing the room partition walls, windows, doors and curtain walls to ensure good sound insulation.

Restaurants – since this a large gathering space with random talks, if acoustics design is not considered, the space becomes very noisy. This would result in lesser footfalls and be-coming less popular. The Design includes –

Internal room wall panelling and false ceiling to attain the optimum RT Designing the room partition walls, windows and doors to ensure good sound insulation. Sound Masking techniques for speech privacy

Ballrooms & Meeting rooms – this space is used for multi-purpose activities and good acoustics within this space is essential. The Design includes -

Internal room wall panelling and false ceiling to attain the optimum RT & STI Designing the room partition walls, windows and doors to ensure good sound insu-lation. Specifying the right type of loudspeakers and its placement.

Back of House Areas – the noise emitted by the large machines such as the diesel genera-tors, AHU’s, transformers, pumps, etc. are a major source of irritants. The De-sign includes -

Internal room wall panelling and false ceiling to absorb maximum sound Designing the room partition walls, windows and doors to ensure good sound insulation.

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Importance of Acoustical Design in Work Spaces

Open Plan offices – for better work productivity a quite office is a must. The design in-cludes –

Internal room wall paneling and false ceiling to attain the op-timum STI

Sound Masking techniques for speech privacy

Executive cabins – Speech privacy within the cabins is essential. The cabin partitions musty also ensure that the discussion happening one cabin does not disturb the adjacent ones. The Design includes -

Designing the room partition walls, windows and doors to en-sure good sound insulation.

Meeting & Discussion rooms – this space requires good acoustic atmos-phere to good speech intelligibility without disturbing the neighbouring spaces. The design includes

Internal room wall panelling and false ceiling to attain the opti-mum STI

Designing the room partition walls, windows and doors to en-sure good sound insulation.

Training Rooms – this space is similar to a classroom, the acoustics of the space is very important as the space is used for learn-ing. . The design includes –

Internal room wall panelling and false ceiling to attain the optimum STI

Designing the room partition walls, windows and doors to ensure good sound insulation.

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Importance of Acoustical Design in Community Living

Residential Units – individual houses must have good noise control measures included to have a peaceful living. The noise sources could be due to heavy road traffic, due to low flying air planes if close to airports, railway noises, etc. The Design Includes – Designing the room partition walls,

windows, doors and curtain walls to ensure good sound insulation.

Design of acoustical barriers

Community Halls – this space is used for multi-purpose activities and good acoustics within this space is essential. The Design includes - Internal room wall panelling and

false ceiling to attain the optimum RT & STI

Designing the room partition walls, windows and doors to ensure good sound insulation.

Specifying the right type of loud-speakers and its placement.

Back of House Areas – the noise emitted by the large machines such as the diesel generators, AHU’s, transformers, pumps, etc. are a major source of irri-tants. The Design includes Internal room wall panelling and

false ceiling to absorb maximum sound

Designing the room partition walls, windows and doors to ensure good sound insulation.

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GENERAL INTERNATIONAL STANDARDS

ENVIRONMENTAL

ISO 1996-1/2/3 Description and measurement of environmental noise - Basic quantities and procedures / Acquisition of data perti-nent to land use / Application to noise limits - equivalent to ASTM E1014 & ANSI S3.23

ISO 9613-1 Attenuation of sound during propagation outdoors - Calculation of the absorption of sound by the atmosphere

ISO 9613-2 Attenuation of sound during propagation outdoors - General method of calculation

ISO 10847 In-situ determination of insertion loss of outdoor noise barriers of all types

ISO 4871 Declaration and verification of noise emission values of machinery and equipment OCCUPATIONAL

ISO R1999 Assessment of occupational noise exposure (or equivalent DIN 45 645-2)

ISO 2204 Measurement of airborne noise and evaluation of its effects on human beings ISO 2204 Measurement of airborne noise and evaluation of its effects on human beings TESTING CHAMBERS

ISO 3740 Determination of sound power levels of noise sources - Guidelines for the use of basic standards - equivalent to ANSI S1.23

ISO 3743-1/2 Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields - Comparison method for hard-walled test rooms / Methods for special reverberation test rooms - equivalent to ANSI S1.32

ISO 3744 Determination of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane - equivalent to ANSI S1.33

ISO 3745 Determination of sound power levels of noise sources - Precision methods for anechoic and semi-anechoic rooms - equivalent to ANSI S1.35 ARCHITECTURAL ACOUSTICS

ISO 140/IV Airborne sound insulation between rooms or equivalent ASTM E-336 / BS EN 20140-4 / DIN 52 210-1

ISO 140/V Airborne sound insulation of facades or equivalent ASTM E-966 / BS EN 20140-5 / DIN 52 210-5

ISO 717-2 Rating of sound insulation in buildings and of building elements - Impact sound insulation

ISO 3382 Measurement of reverberation time and impulse response

ISO 11654 Sound absorbers for use in buildings - Rating of sound absorption

ISO 16032 Measurement of SPL of building equipment - engineering method

ASTM E-1014 Measurement of outdoor A-weighted sound levels

ASTM E-1041 Masking sound in open offices

ASTM E-1111 Interz-one attenuation of ceiling systems

ASTM E-1130 Objective measurement of speech privacy using Articulation Index

ASTM E-1374 Guide for open office acoustics and applicable standards

ASTM E-1414 Airborne sound attenuation between rooms sharing common ceiling plenum or equivalent DIN 52 217

ASTM E-1433 Guide for selection of standards on environmental acoustics

ASTM E-1503 Test method for outdoor sound measurements

ASTM E-1573 Masking sound in open offices with A-weighted and one-third octave band SPL

ASTM E-1779 Measurement plan for outdoor sound

ANSI S3.1 Maximum permissible ambient noise levels (MPANL) in audiometric rooms

ANSI S12.60 Guidelines for classroom acoustics

SMPTE EG18 Design of cinema