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- Sound absorption is the change of sound energy into some other form,
usually heat, in passing through a medium or on striking a surface.
- At a specified frequency or in a specified frequency
band, property of a material or an object whereby sound energy is converted into
heat by propagation in a medium or when sound strikes the boundary between two
media.
Source:
Glossary of Terms
in Noise Control Engineering
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(1) The process of dissipating sound energy. (2) The property possessed by
materials, objects and structures such as rooms of absorbing sound energy. (3)
A: [L2]; metric sabin---in a specified frequency band, the measure of the
magnitude of the absorptive property of a material, an object, or a structure
such as a room.
Source:
http://www.owenscorning.com/around/sound/glossary.asp
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