Auralex Acoustics Studiofoam Metro Acoustic Absorption Foam, 2" x 24" x 48", 12-Panels, Burgundy

Studiofoam Metro products serve to spread sonic energy out in the time domain, as well as each absorbing a slightly different slice of the frequency spectrum. You see, it takes slightly different amounts of time for sound waves to travel through the different sections of the Metro, strike the mounting surface and travel back through the Metro into the room, so wavefronts are in effect softened rather than just being absorbed.