sound absorption coefficient


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Related to sound absorption coefficient: Noise Reduction Coefficient

sound absorption coefficient

[′sau̇nd ab‚sȯrp·shən ‚kō·i‚fish·ənt]
(acoustics)
The ratio of sound energy absorbed to that arriving at a surface or medium. Also known as acoustic absorption coefficient; acoustic absorptivity.

sound absorption coefficient,

a The fraction of the sound energy (incident at random angles on a surface) which is absorbed or otherwise not reflected by the surface.
References in periodicals archive ?
Table 1 Sound absorption coefficient (SAC, [alpha]) comparison between OPT natural fiber, Mesocarp fiber, Arenga Pinnata, paddy fiber and date palm fiber.
Figure 5 compares the sound absorption coefficient using the poroelastic model to the measured sound absorption with good agreement.
To access globally the acoustic absorption performance of different materials, the average sound absorption is defined as the average of the sound absorption coefficient determined at four octave bands with center frequencies: 250, 500, 1000, 2000, and 4000 Hz.
Thus, taking into account the specimens of chopped reeds, the trend towards the incident sound absorption coefficient is similar to that of a reduction in the sound level where efficiency at all frequencies also depends on increased thickness.
Design of sound absorbers that provide sufficient sound absorption coefficient that minimizes the size and cost, does not introduce any environmental hazards, and stands up to hostile environments is one of the most frequent problems faced by noise control engineers.