Acoustic foam

Acoustic foam is an open-celled foam used for acoustic treatment. It attenuates airborne sound-waves, reducing their amplitude, for the purposes of noise reduction or noise control. The energy is dissipated as heat. Acoustic foam is primarily made from petroleum-based polyurethane, though some types use melamine. The foam can be made in several different colors, sizes, and thicknesses.

Acoustic foam is often used in recording studios, home cinemas, or nightclubs to control noise, vibrations, and echoes. The foam can be attached to walls, ceilings, doors, and other features of a room. Due to its oil-based character, acoustic foam can be flammable, and has been associated with several fire disasters. To mitigate this risk, many acoustic foam products are treated with fire retardants.