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🧱 Absorption Coefficients Database
Searchable reference table of absorption coefficients (α) for common acoustic materials at standard octave bands. Use these values for RT60 calculations and acoustic treatment planning.
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| Material | 125 Hz | 250 Hz | 500 Hz | 1 kHz | 2 kHz | 4 kHz | NRC |
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Absorption coefficients are approximate values at standard octave band frequencies. Actual performance varies with material thickness, mounting method, and installation conditions. NRC (Noise Reduction Coefficient) is the average of 250 Hz, 500 Hz, 1 kHz, and 2 kHz values.
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