Acoustic absorbing materials will absorb most of the sound energy that collides with them and will reflect very little

Acoustic absorption is the process by which sound energy is dissipated and transformed into another form of energy: heat, mechanical, or deformation.

From a scientific standpoint, there are three primary types of sound absorbers: porous, membrane, and resonance.

Sound absorbing materials will absorb most of the sound energy that collides with them and will reflect very little. These qualities make them useful in the control of noise within a space or enclosure. They are used in a variety of locations: close to the source of the noise, paths, or close to receivers.