2. 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
3. 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 outof the space. Sound
insulation techniques are often used in business
settings, as well as in multi-family dwellings like
duplexes and apartment buildings.
4. 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.
6. 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.
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
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.
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
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.
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.
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.
24. • 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
26. 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.
• Theacoustic 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.
28. 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.
30. 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
