Exposed Brick Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Unplastered brickwork, either structural or facing brick. Very low absorption across all frequencies. The rough surface texture provides marginally more scattering than smooth surfaces but negligible absorption benefit.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.02 | 0.03 | 0.03 | 0.04 | 0.05 | 0.07 |
RT60 Impact
Exposed brick is essentially reflective. Requires compensating absorption on other surfaces to control reverberation
Frequently Asked Questions
What is the NRC of Exposed Brick?
Exposed Brick has an NRC (Noise Reduction Coefficient) of 0.05, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Exposed Brick typically used?
Exposed Brick is typically used as a wall treatment. Unplastered brickwork, either structural or facing brick.
How much does Exposed Brick reduce RT60?
Exposed brick is essentially reflective. Requires compensating absorption on other surfaces to control reverberation
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