Transcript Sound Insulation and Sound absorbing materials

Sound insulation materials and
constructions
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Content
1. Sound insulation vs. Sound absorbing/Airborne sound and
impact sound
2. System for sound insulation of partition wall
3. System for sound insulation of ceiling
4. System for sound insulation of floor
5. Soundproofing doors
6. Sound insulation of windows
7. A little theory .... 
Tsvetan Nedkov, Ivaylo Hristev
UACG 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 ”
Airborne sound and impact sound
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Basic principles of the sound insulations
The effective sound reduction is achieved through the
combination of sound absorbing and sound insulation
Sound reduction
Sound absorbing
Wa
Sound insulation
(Wo-WT)
Tsvetan Nedkov, Ivaylo Hristev
UACG 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
Single wall
Rw = 30 dB
Double wall
Rw = 36 dB
Two separate walls
Rw = 50 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 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 Hristev
UACG 2014 г.
System for sound insulation of partition wall
The sound absorbing material can be from mineral wool, polyester
wool or foamed polyurethane
Mineral wool
Thickness 30 – 100 kg. /m3
Coefficient of air flow resistivity
10 000 – 40 000 Rayl/m
Polyester wool
Thickness 10 – 60 kg./m3
Coefficient of air flow resistivity
2000 – 10 000 Rayl/m
инж. Цветан Недков , Технически
университет София 2014 г.
Foamed polyurethane
Thickness 18 – 100 kg./m3
Coefficient 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
Gypsum
Density 600 – 700 kg. /m3
Thickness: 9.5, 12.5 , 15 мм
Gypsum faser
Density 1130 – 1180 kg. /m3
Thickness: 10, 12.5 , 15, 18 мм
Cement fdaser board
Wooden boards
Density1300 kg. /m3
Density 500-800 kg. /m3
Thickness: 10, 12.5 , 15 мм Thickness: 8, 10 ,15,20 мм
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
The elastic membrane can be bitumen membrane with
supplements or heavy vinyl
Bitumen membrane
Density 1200 – 1800 kg. /m3
Thickness: 2, 4 , 5 mm
Heavy vinyl:
Density1800 – 2000 кг. /м3
Thickness: 1, 2 , 3, 4 mm
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
The rubber spacer separate the hanging construction by the
perimeter of the wall
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
The separation of the two boards of the elastic connection
improves the efficiency of the sound reduction constructions
Vibro hangers
The metal part with rubber pad
of SBR or EPDM rubber
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
The index of sound insulation Rw of the partition wall with or without insulation
Rw of brick wall = 37 dB
Rw of brick wall
with sound insulation= 58
dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
Breakthroughs
in the
efficiency of
the sound
insulation
③
④
Resonance
frequency
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Effect of the
coincidence
Volume / weight /
②
Natural frequency of
oscillations
①
Bending stiffnes
Influence of the properties of
the materials over the sound
insulation
Index of sound insulation (dB)
Curve describing the index of sound insulation of partition Rw
Frequency(Hz)
Frequencies of coincidence
System for sound insulation of partition wall
Index of sound insulation Rw of partition wall without sound absorbing in the air gap
Rw without sound absorbing = 45 dB
Rw with sound absorbing = 58 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
Index of sound insulation Rw of partition wall with rigid connection and with vibro hanger
Rw rigid connection = 55 dB
Rw vibro hanger = 58 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
Index of sound insulation Rw of partition wall with one layer gypsum
Rw one layer gypsum = 50 dB
Rw two layers of gypsum borads = 58 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of partition wall
Index of sound insulation Rw of partition wall with air gap 150 мм
Rw with air gap 50 мм = 58 dB
Rw with air gap 150 мм = 63 dB
Sound absorbing 50 мм /rock wool/
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of ceiling
1.Concrete slab;
2.Sound absorbing layer;
3.Hanging construction;
4,5,6.Boards with elastic material
between them;
7. Vibro hanger;
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of ceiling
Used materials and hanging constructions in ceiling sound insulation systems
Boards
Sound absorbing materials
Elastic layers
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of ceiling
Index of sound insulation Rw of suspended ceiling
Rw of concrete slab 140 мм = 54 dB
Rw of the sound insulation system with air
gap 50 mm = 73 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of ceiling
Index of sound insulation against impact noise Ln,w of suspended ceiling
Ln,w concrete slab 140 мм = 80 dB
Ln,w of sound insulation system with air
gap 50 mm = 53 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 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 Hristev
UACG 2014 г.
System for sound insulation of floor from impact noise
Elastic membrane
Density 600 – 1800 kg. /m3
Thickness: 2,3, 4 to 10 mm
Mineral wool
Density 150 – 180 kg./m3
Thickness: 20 to 100 mm
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Elastomeric
Density 80 – 150 kg./m3
Thickness: 5 to 30 mm
System for sound insulation of floor from impact noise
Index of sound insulation of impact noise Ln,w of floor
Ln,w of concrete floor 140 мм = 80 dB
Ln,w with elastic pad 6 mm = 55 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of floor from impact noise
Index of sound insulation of impact noise Ln,w of floor
Ln,w of concrete floor 140 мм = 80 dB
Ln,w with mineral wool 50 mm = 59 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
System for sound insulation of floor from impact noise
Index of sound insulation of noise Ln,w of floor
Ln,w of concrete floor 140 мм = 80 dB
Ln,w with elastomer 30 mm = 49 dB
Tsvetan Nedkov, Ivaylo Hristev
UACG 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 Hristev
UACG 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 Hristev
UACG 2014 г.
Sound insulation windows
Index of sound insulation Rw of single window 4 mm
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 12 mm air + 4mm
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 12 mm air + 6 mm
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 24 mm air + 6mm
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Sound insulation of windows
Index of sound insulation Rw of double window 4 + 24 mm air + 2х4mm glued with PVB
membrane
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Model of Sharp for calculation of sound insulation of double
partition
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.
Thank you for your attention!
Tsvetan Nedkov, Ivaylo Hristev
UACG 2014 г.