Acoustic foam is a lightweight material made from polyurethane foam. It is cut into tiles - often with pyramid or wedge shapes - which are suited to placing on the walls of a recording studio or a similar type of environment to act as a sound absorber, thus enhancing the sound quality within a room.
Acoustic foam reduces or eliminates echoes and background noises by controlling the reverberation that sound can make by bouncing off walls. This type of sound absorption is different from soundproofing, which is typically used to keep sound from escaping or entering a room. These Sound absorbers are used to improve the acoustics of the room, which thereby reduces noise in the room.