upgraded 12 pack acoustic panels sound proof foam panels sound proof padding, 12"x12"x 0.4" high density bevled edge sound panel, idea for acoustic treatment & wall decoration (grey) dekiru acoustic panels breaks the direction of the sound waves that travel through a room and bounce off walls or ceilings, to trap unwanted sounds resulting in a cleaner sound free of echoes, background noises and reverb. not only used in recording studios