Helmholtz Resonator Panel Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Tuned cavity absorber targeting specific low frequencies. Consists of a perforated face panel over a sealed cavity, tuned by hole size, spacing, and cavity depth. Used to address specific room modes or low-frequency excess without affecting mid-high frequency clarity.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.60 | 0.50 | 0.35 | 0.25 | 0.20 | 0.15 |
RT60 Impact
Helmholtz panels provide targeted low-frequency absorption. Four 1m² panels tuned to 125Hz can reduce RT60 at that frequency by 0.20-0.35s in a 100m³ room
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Frequently Asked Questions
What is the NRC of Helmholtz Resonator Panel?
Helmholtz Resonator Panel has an NRC (Noise Reduction Coefficient) of 0.45, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Helmholtz Resonator Panel typically used?
Helmholtz Resonator Panel is typically used as a wall and ceiling treatment. Tuned cavity absorber targeting specific low frequencies.
How much does Helmholtz Resonator Panel reduce RT60?
Helmholtz panels provide targeted low-frequency absorption. Four 1m² panels tuned to 125Hz can reduce RT60 at that frequency by 0.20-0.35s in a 100m³ room
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