Diffusers — Acoustic Material Guide
Acoustic diffusers scatter incident sound energy evenly across a wide frequency range rather than absorbing it. QRD (Quadratic Residue Diffuser) panels use mathematically derived well depths to distribute reflections uniformly. Diffusers maintain room liveliness while eliminating flutter echoes, making them ideal for performance spaces, studios, and critical listening rooms.
Products in This Category
| Material | NRC | αw | Applications |
|---|---|---|---|
| QRD Diffuser Panel | 0.15 | 0.10 | Wall, Ceiling |
Average Absorption Profile
Average absorption coefficients across all diffusers materials at each octave band frequency.
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| Avg α | 0.10 | 0.15 | 0.20 | 0.15 | 0.10 | 0.10 |
Best Applications
Room types and environments that benefit most from diffusers materials:
Related Standards
International and national standards relevant to diffusers selection, testing, and specification:
Installation Notes
Diffusers should be mounted at the first reflection points on walls and ceiling. For QRD panels, the design frequency determines the well depth. Ensure the panel is oriented perpendicular to the primary sound path for maximum scattering effectiveness.
Typical thickness: 50-300mm (well depth)
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