Acoustic foam

[3] Acoustic foam can be attached to walls, ceilings, doors, and other features of a room to control noise levels, vibration, and echoes.

[6] This purpose requires strategic placement of acoustic foam panels on walls, ceilings, floors and other surfaces.

[7] The objective of acoustic foam is to enhance the sonic properties of a room by effectively managing unwanted reverberations.

One surface of these tiles often features pyramid, cone, wedge, or uneven cuboid shapes.

[11] Acoustic foam panels typically suppress reverberations in the mid and high frequencies.