Sound insulation

shreyas saspara

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?? 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. 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 70 o 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:-