Acoustic Foam a Porous Sound Absorber

Acoustic Foam works by absorbing sound which spontaneously converts part of the sound energy to a very small amount of heat in the intervening object (the absorbing material) , rather than sound being transmitted or reflected.

There are several ways in which a material can absorb sound. The choice of sound absorbing material will be determined by the frequency distribution of noise to be absorbed and the acoustic absorption profile required.

Porous Acoustic Foam Sound Absorbers

Porous absorbers, typically open cell acoustic foams , absorb noise by friction within the cell structure.

Porous open cell acoustic foams are highly effective noise absorbers across a broad range of medium to high frequencies.

The exact absorption profile of a porous open cell acoustic foam will be determined by a number of factors including the following:

• Cell size
• Torosity
• Porosity
• Material thickness
• Material hardness
• Material density