Absorption coefficients of common materials at several frequencies

Table
Absorption coefficients of common materials at several frequencies
frequency (hertz)
material 125 250 500 1,000 2,000 4,000
concrete 0.01 0.01 0.02 0.02 0.02 0.03
plasterboard 0.20 0.15 0.10 0.08 0.04 0.02
acoustic board 0.25 0.45 0.80 0.90 0.90 0.90
curtains 0.05 0.12 0.25 0.35 0.40 0.45
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Universalium. 2010.

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