QRD Diffuser Panel Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Quadratic Residue Diffuser with mathematically-derived well depths that scatter incident sound evenly across a wide frequency range. Does not absorb sound — redistributes it. Used in recording studios, concert halls, and critical listening rooms to maintain liveliness while eliminating flutter echoes.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.10 | 0.15 | 0.20 | 0.15 | 0.10 | 0.10 |
RT60 Impact
Diffusers scatter sound rather than absorbing it. They do not significantly reduce RT60 but improve perceived clarity by redistributing reflections
Manufacturers & Brands
Frequently Asked Questions
What is the NRC of QRD Diffuser Panel?
QRD Diffuser Panel has an NRC (Noise Reduction Coefficient) of 0.15, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is QRD Diffuser Panel typically used?
QRD Diffuser Panel is typically used as a wall and ceiling treatment. Quadratic Residue Diffuser with mathematically-derived well depths that scatter incident sound evenly across a wide frequency range.
How much does QRD Diffuser Panel reduce RT60?
Diffusers scatter sound rather than absorbing it. They do not significantly reduce RT60 but improve perceived clarity by redistributing reflections
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