Resonators — Acoustic Material Guide
Acoustic resonators including Helmholtz resonator panels and membrane (panel) absorbers provide targeted low-frequency absorption without affecting mid-to-high frequency clarity. Helmholtz resonators use tuned cavities behind perforated faces, while membrane absorbers use non-perforated vibrating panels over sealed air gaps. Both are critical for balancing room response in studios and performance spaces.
Products in This Category
| Material | NRC | αw | Applications |
|---|---|---|---|
| Helmholtz Resonator Panel | 0.45 | 0.40 | Wall, Ceiling |
| Membrane Absorber (Panel Absorber) | 0.30 | 0.25 | Wall, Ceiling |
Average Absorption Profile
Average absorption coefficients across all resonators materials at each octave band frequency.
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| Avg α | 0.53 | 0.42 | 0.30 | 0.21 | 0.17 | 0.14 |
Best Applications
Room types and environments that benefit most from resonators materials:
Related Standards
International and national standards relevant to resonators selection, testing, and specification:
Installation Notes
Helmholtz resonators must be tuned to the target frequency by adjusting hole diameter, spacing, and cavity depth. The cavity must be sealed at the back and sides for accurate tuning. Membrane absorbers require a rigid, airtight frame to function correctly as the panel must vibrate freely.
Typical thickness: 50-300mm (cavity depth dependent)
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