Sound insulation materials and constructions Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.
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Transcript of Sound insulation materials and constructions Tsvetan Nedkov, Ivaylo Hristev UACG 2014 г.
Content
1. Sound insulation vs. Sound absorbing/Airborne sound and impact sound2. System for sound insulation of partition wall3. System for sound insulation of ceiling4. System for sound insulation of floor5. Soundproofing doors6. Sound insulation of windows7. A little theory ....
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation vs. Sound absorbing
The sound insulation reduces the amount of passed through the barrier sound energy “Wt”
The sound absorbing reduces the amount of the reflected back in the premises sound energy “Wr”
Basic principles of the sound insulations
The effective sound reduction is achieved through the combination of sound absorbing and sound insulation
Sound reduction
Sound insulation(Wo-WT)
Sound absorbingWa
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Basic principles of the sound insulation
The combination of light boards with air volume between them increases the sound insulation between two premises
Double wallRw = 36 dB
Single wallRw = 30 dB
Two separate wallsRw = 50 dB
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
System for sound insulation of partition wall
1.Sound absorbing material;
2.Sandwich panels with elastic membrane between them;
3. Rubber spacer;
4. Vibro hanger;
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
инж. Цветан Недков , Технически университет София 2014 г.
The sound absorbing material can be from mineral wool, polyester wool or foamed polyurethane
Mineral woolThickness 30 – 100 kg. /m3Coefficient of air flow resistivity 10 000 – 40 000 Rayl/m
Polyester woolThickness 10 – 60 kg./m3Coefficient of air flow resistivity 2000 – 10 000 Rayl/m
Foamed polyurethaneThickness 18 – 100 kg./m3Coefficient of air flow resistivity 10 000 – 20 000 Rayl/m
System for sound insulation of partition wall
The panels which are used for partition can be gypsum, gypsum faser, cement faser board or wooden boards
GypsumDensity 600 – 700 kg. /m3Thickness: 9.5, 12.5 , 15 мм
Gypsum faserDensity 1130 – 1180 kg. /m3Thickness: 10, 12.5 , 15, 18 мм
Cement fdaser boardDensity1300 kg. /m3Thickness: 10, 12.5 , 15 мм
Wooden boardsDensity 500-800 kg. /m3Thickness: 8, 10 ,15,20 мм
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
The elastic membrane can be bitumen membrane with supplements or heavy vinyl
Bitumen membraneDensity 1200 – 1800 kg. /m3Thickness: 2, 4 , 5 mm
Heavy vinyl:Density1800 – 2000 кг. /м3Thickness: 1, 2 , 3, 4 mm
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
The rubber spacer separate the hanging construction by the perimeter of the wall
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
The separation of the two boards of the elastic connection improves the efficiency of the sound reduction constructions
Vibro hangersThe metal part with rubber pad of SBR or EPDM rubber
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
The index of sound insulation Rw of the partition wall with or without insulation
Rw of brick wall = 37 dBRw of brick wall with sound insulation= 58 dB
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Curve describing the index of sound insulation of partition Rw
System for sound insulation of partition wall
Resonance frequency
Nat
ural
freq
uenc
y of
os
cilla
tions
Bend
ing
stiffn
es
Volu
me
/ w
eigh
t /
Inde
x of
sou
nd in
sula
tion
(dB)
Frequencies of coincidenceFrequency(Hz)
Breakthroughs in the efficiency of the sound insulation Eff
ect o
f the
co
inci
denc
e
Influence of the properties of the materials over the sound insulation
①
②
③
④
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation Rw of partition wall without sound absorbing in the air gap
Rw without sound absorbing = 45 dBRw with sound absorbing = 58 dB
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation Rw of partition wall with rigid connection and with vibro hanger
Rw rigid connection = 55 dBRw vibro hanger = 58 dB
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation Rw of partition wall with one layer gypsum
Rw one layer gypsum = 50 dBRw two layers of gypsum borads = 58 dB
System for sound insulation of partition wall
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation Rw of partition wall with air gap 150 мм
Rw with air gap 50 мм = 58 dBRw with air gap 150 мм = 63 dB
System for sound insulation of partition wall
Sound absorbing 50 мм /rock wool/
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
1.Concrete slab;
2.Sound absorbing layer;
3.Hanging construction;
4,5,6.Boards with elastic material between them;
7. Vibro hanger;
System for sound insulation of ceiling
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
System for sound insulation of ceilingUsed materials and hanging constructions in ceiling sound insulation systems
Boards
Sound absorbing materials
Elastic layers
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation Rw of suspended ceiling
Rw of concrete slab 140 мм = 54 dBRw of the sound insulation system with air gap 50 mm = 73 dB
System for sound insulation of ceiling
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation against impact noise Ln,w of suspended ceiling
Ln,w concrete slab 140 мм = 80 dBLn,w of sound insulation system with air gap 50 mm = 53 dB
System for sound insulation of ceiling
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
System for sound insulation of floor from impact noise
1.Concrete slab;
2.Elastic membrane, mineral wool, elastomeric with high density;
3,4,5 Floor coating, laminate, carpet;
6.Baseboard;
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
System for sound insulation of floor from impact noise
Elastic membraneDensity 600 – 1800 kg. /m3Thickness: 2,3, 4 to 10 mm
Mineral woolDensity 150 – 180 kg./m3Thickness: 20 to 100 mm
ElastomericDensity 80 – 150 kg./m3Thickness: 5 to 30 mm
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation of impact noise Ln,w of floor
Ln,w of concrete floor 140 мм = 80 dBLn,w with elastic pad 6 mm = 55 dB
System for sound insulation of floor from impact noise
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation of impact noise Ln,w of floor
Ln,w of concrete floor 140 мм = 80 dBLn,w with mineral wool 50 mm = 59 dB
System for sound insulation of floor from impact noise
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Index of sound insulation of noise Ln,w of floor
Ln,w of concrete floor 140 мм = 80 dBLn,w with elastomer 30 mm = 49 dB
System for sound insulation of floor from impact noise
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulating doors
1.Metal plate;2.Elastic membrane layer;3.Heavy thick layer;4. Sound absorbing layer;5.Door case;6.Seals;7.Lock;8.External hinges;
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation of windows
Basic principals during selection of sound insulating windows:
- The windows should be with different thickness when are combined – for exmp. 4 + 6 mm or 4 + 8 mm;-The usage of wider spacers increase the index of sound insulation;- In glued together windows the adding of PVB membrane increases the index of sound insulation;-The frame and the connection to the wall have significant meaning;-The sizes of the frames – in increasing sizes of the window without extra framing the index of sound insulation is decreasing;- If it’s possible to be added sound absorbing to the internal perimeter of the frame;
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation windows
Index of sound insulation Rw of single window 4 mm
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 12 mm air + 4mm
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 12 mm air + 6 mm
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 24 mm air + 6mm
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 24 mm air + 2х4mm glued with PVBmembrane
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.
Model of Sharp for calculation of sound insulation of double partition
Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.