Sound insulation is the process of soundproofing an enclosed space to prevent sound from filtering in or out. Various materials can be used for sound insulation like fiberglass wool, rock wool, glass wool, mass loaded vinyl, cork, green glue and foam panels. These materials work by absorbing, reflecting or damping sound vibrations. Sound insulation is important in environments like recording studios, homes and offices to reduce noise transfer between spaces and for human health and safety.

1. What is sound ??
• In the physical terms, sound is the
vibrations that travel through the air
or another medium
• It is a form of energy
It is generated in air when particles
oscillate around their equilibrium
position

2. What is sound insulation ??
• Sound insulation is the process of
soundproofing an enclosed space, such
as a room.
• This type of insulating activity is
usually employed when there is a need
to keep sound from filtering into or out
of the space. Sound insulation
techniques are often used in business
settings, as well as in multi-family
dwellings like duplexes and apartment
buildings.

3. Example:
• One example of how sound insulation is used is
found in a recording studio.
• In order to prevent background noise from
interfering with the recording process, singers and
musicians create their vocal and instrumental
tracks in a soundproof recording booth. Because
the booth prohibits the introduction of sounds
from outside the space, there is nothing present to
distort or interfere with the quality of the
recording. The audio tracks containing vocal
performances and the various music tracks are
captured exactly as the performers hear them.

4. How sound transmit ??

5. How to choose the perfect material
??
• Sound absorption, weight and air tightness
are the important properties that determines
the sound insulation capacity of any material.
• They can be easily applied mainly on walls,
ceiling,floor insulation.

6. What is the use of sound
insulation??
1. Neighbor comfort
• If you live in a house with very close neighbor, you will
want comfort among them.
• Sound insulation prevents voice leaks, in which close
houses tend to hear or feel sounds and voices from
the neighbor house.
2. Human health and safety
• Too much noise is not only bad for the environment
but for the human too. We are not designed for
excessive noise. If the sound is too much high then it
cause to deafness permanently or partially

7. .
• Sound Insulation has to be looked into for two
aspects. One is sound insulation for
preventing the sound transfer and the other is
for acoustic control
SR
NO.
SITUATION INSULATION IN dB
1. Between the living room in one house or flat and the
living room and bedroom in another
50
2. Elsewhere between house or flat 40
3. Between one room and another in the same house or
flat
30
4. Between teaching rooms (i.e., lecture rooms) in a school 40
5. Between one room and another room in an office 30
6. Between one ward and another ward in a hospital
a) Normal wards
b) Extra-quiet special wards
40
45

8. Consideration of materials used.
• Climate
• Ease of installation
• Durability - resistance to degradation from
compression, moisture, decomposition, etc.
• Ease of replacement at end of life
• Cost effectiveness
• Toxicity
• Flammability
• Environmental impact and sustainability

9. Why sound insulation is necessary ??

10. Where is the sound insulation
needed??
• Museums/Libraries
• Conference Rooms
• Entertainment Facilities
• Residential
• Apartments
• Home Offices
• Home Recording Studios
• Auditoriums/Gymnasiums
• Restaurants
• Broadcast Studios
• Recording Studios
• Theaters
• Music Halls
• Sanctuaries
• Institutional

11. Sound Insulating Materials:
• Glass wool or Fiber glass wool
• Rock wool
• Glass insulation
• Mass loaded vinyl
• Cork sound insulation
• Green glue
• Foam panels
• Gypsum / POP boards
• Thermocol

12. 1. Fibre glass wool sheets:
• Fibber glass wool is an insulating material made from
fibers of glass arranged using a binder into a texture
similar to wool.
• Glass wool is a sound insulation that consists of
intertwined and flexible glass fibers, which causes it to
"package" air, resulting in a low density that can be
varied through compression and binder content. that
can be used to insulate flat surfaces such as cavity wall,
ceiling tiles , curtain wall as well as ducting . It is also
used to insulate piping and for soundproofing.
• Fiber glass wool popular because of its high-energy
conservation and sound insulation.
• It is widely used in the process industries, building & air
conditioning.

13. Fibre glass wool

14. 2. Rock wool:-
• Rock wool insulation makes a significant
contribution to reducing noise and helps to
protect your health.
• Rock wool has an open fibre structure, which
is ideal for the absorption and regulation of
sound.
• Rock wool technical insulation products
therefore lower the noise of machinery and
human activities

15. Rock wool:-

16. 3. Glass insulation:-
• The highest noise insulation is achieved using
an acoustic laminated glass.
• Glass controls noise by:
• Reflecting the noise back towards the source,
and
• Absorbing the noise energy within the glass.
• We can improve the sound insulation of glass
in different ways - increasing the thickness of
the panel, using laminated glass on its own or
within an Insulating Glass Unit (IGU)

17. .
• …The larger the gap between the panes, the
better the insulation.

18. .
• Insulated glass is a prefabricated unit made of two or more
glass panes with aluminum or stainless steel spacers, filled
with desiccant ,which are edge-sealed around with
compound sealant.
• Normally, the spacers width of insulated glass is
6mm,9mm,12mm,15mm,18mm etc.

19. 4.Mass loaded vinyl:
• It is made from a high-grade vinyl material that is
suffused with barium salts and sand to give it the same
characteristics as lead. It can be used on floors or in
walls and it is extremely durable.
• Pattern- Smooth Finish
• Features- High density limp material to reduce noise
transmission.
• Applications -Reduced noise transmission through
ceilings, walls, floors, machinery enclosures, ductwork.
Apply over suspended ceilings on studs or joists.
• Installation- Material can be nailed, screwed, stapled or
can be reinforced and hung like a curtain.
• Colors - Black, Grey.

20. Mass loaded vinyl:

21. 5.Cork sound insulation:-
• Cork is made from the bark of cork-oak tree. The bark
of tree is cleaned, sized, ground to powder and then
baked. While it is being baked, it oozes natural resin.
This resin binds the powdered cork to form a
slab/sheet when pressed or rolled.
• Cork sheets are available in market and can be used for
paneling. These can be coated with melamine polish to
reduce abrasion damages, but the coating affects
acoustic control is marginally.
• Cork is a very light material It is porous and not
affected by moisture. It is a good Sound insulator both
for sound transfer and for acoustic effects. It is an
electric insulator and also a heat insulator for
temperatures below 70o C.

22. Cork sound insulation:-

23. 6. Green glue:-
• Green Glue is a visco-elastic damping compound. In simple terms that
means that it dampens vibrations.
• The reason it is such a fabulous soundproofing material is because
sound is an energy wave that travels by vibration. It travels through the
air by vibrating air molecules and through walls and ceilings by
vibrating them as well. The better damped a material is the quicker it
will dissipate (disperse) the sound energy into heat energy, to keep it
simple, it will stop the vibrations quickly.
• Green Glue is the highest performing damping compound to have
been lab and field tested on the market today.
• it is applied in between two rigid layers. In practical terms Green Glue
is applied between two layers of drywall (walls and/or ceilings) or two
layers of plywood (sub flooring) etc.
• The result is that the two layers are now one larger damped material
which dissipates sound energy very quickly and efficiently. However
with green glue you will get better results
• a) because it is a better damping compound
• b) because you are applying it between two full layers of drywall so
your wall/ceiling/floor is heavier than if you were using one layer.

24. Green glue:-

25. 7. Foam panels insulation:-
• Acoustic foam is an open celled foam used for acoustic treatment. It
attenuates airborne sound waves by increasing air resistance, thus
reducing the amplitude of the waves. The energy is dissipated as
heat.
• The acoustic foam is used to improve the sound quality by
removing residual sound in any space. This purpose requires
strategic placement of acoustic foam panels on walls, ceiling and
floors, effectively eliminating resonance within the room.
• The objective is to enhance the properties of sound by improving
speech clarity and sound quality.
• For this reason, acoustic foam is often used in recording studios.
The purpose is to reduce, but not entirely eliminate resonance
within the room.
• Acoustic Foam can be made in several different colors, sizes and
thickness.

26. Foam panels insulation:-

27. 8.Thermocol:-
• Thermocol is a type of plastic and has good thermal
insulation properties.
• It can also be molded to any desired shape in Plastic
molding machine.
• Thermocol tiles are used in false ceiling and as face
tiles.
• Thermocol is very light and is not adequately strong. It
gets abraded with slight friction. Hence for thermally
insulated partitions, it is only a filling material and not
a surface material.
• Thermocol has good sound insulation properties from
sound transfer point of view and from acoustic effects.

28. Thermocol:-

29. 9.Gypsum / POP boards:-
• These boards are good thermal insulator and
are useful for acoustic effects.
• These boards are more economical compared
to particle and fibres boards, and are not
combustible

30. Gypsum / POP boards:-