Acoustic foam is a special foam made to absorb sound. It is available in a variety of thicknesses. Acoustic foam generally has some flame retardant properties. Acoustic panels normally range from 1 inch to 4 inches which is cut from a large block of acoustic foam.
Acoustic foam is cut into a variety of shapes and sizes and coated according to the purpose of the foam. Open-celled absorb sound better than close-celled Al foam. The introduction of carbon nanotubes to polyurethane foams has improved dampening even more.
- Wedge or V cut
- To reduce echo and reverb
- Improve speech intelligibility
- Absorb or Diffuse sound
- Melamine resin
Interesting. A patent was filed on Dec 13, 1962 for an acoustic polyurethane foam. US 3196975 A