Sound absorption principle of Perforated acoustic panels


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Sound absorption principle of Perforated acoustic panels

The sound absorption principle of the Perforated acoustic panels is that the sound absorption is the phenomenon of energy loss after the sound wave strikes the surface of the material, and the sound absorption can reduce the indoor sound pressure level.

The indicator for sound absorption is the sound absorption coefficient a,

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 which represents the ratio of the acoustic energy absorbed by the material to the incident energy. 

Theoretically, if a material completely reflects the sound, then it's a = 0; if a material absorbs all the incoming sound energy, then it's a = 1. In fact, all the material a between 0 and 1, that is, can not be all reflected, it is impossible to absorb all.