sound-energy-absorption-coefficient
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sound energy absorption coefficient
HB50
fraction of the incident sound energy absorbed (i.e. not reflected) by a material
Sound energy absorption coefficients vary with frequency, angle of incidence of the sound (normal or random incidence) and fixing details. In practice, they range from 0.01 (99 % reflection) for polished marble to 1.00 for a perfect absorber such as an open window.
See also: reverberation absorption coefficient