Absorption

“Absorption”, in terms of sound, refers to the acoustical process where surfaces take in (absorb) sound energy. The more absorption a surface provides, the less energy remains to be reflected and redirected to other parts of the room.

Absorption is measured in the unit Sabins, where 1 Sabin is the absorption that 1 square meter of 100% absorptive material provides. 

Absorption is one of the key acoustical properties used to treat rooms used in professional sound mixing and sound editing, as without proper use of absorption, the sound professional would not get an accurate perception of the sound being played back from the speakers (ie. they would be hearing not only the sound from the speakers, but the additional reflections of the sound across all of the surfaces in the room).

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