What is acoustic foam
Where is it used?
Acoustic form is used in home studios and home theatres. It is economical and easy to install. It is not designed to look good enough to be installed in offices or restaurants, but with a high NRC rating it is effective in dampening sound in a room.
It is not used for soundproofing as it is not dense, and the STC value is very low.
How is it installed?
Typically it is installed with spray glue or double sided tape. If the foam falls off the wall, it is light enough it won't get damaged or damage anything in the room. It can be installed in a matter of minutes.
What colours and sizes do they come in?
Typically black, grey and white, are the popular colours they come in. They come in thicknesses from 1" to 3". The thicker the foam, the higher the NRC value.
Why are there different faces, such as blades, and pyramids to the foam?
The different faces to the foam, provide different acoustic absorption behaviour. Refer to Auralex for a comprehensive explanation.
Where can I get it?
Is the foam fire rated?
Some acoustic foam is fire rated. If the foam is to be installed in a commercial space, insist on seeing the fire rating documentation.
Here is a video explaining how to install acoustic foam on the walls.