Micro-Perforated Panel (MPP) Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Metal, acrylic, or timber panel with sub-millimetre perforations (0.3-0.8mm diameter) acting as a resonant absorber. No fibre infill required — the micro-perforations provide sufficient acoustic resistance. Suitable for clean-room and food-production environments.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.15 | 0.35 | 0.65 | 0.75 | 0.65 | 0.50 |
RT60 Impact
Installing 20m² of MPP with 100mm cavity in a 100m³ room reduces RT60 by approximately 0.30s at 500Hz
Manufacturers & Brands
Frequently Asked Questions
What is the NRC of Micro-Perforated Panel (MPP)?
Micro-Perforated Panel (MPP) has an NRC (Noise Reduction Coefficient) of 0.60, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Micro-Perforated Panel (MPP) typically used?
Micro-Perforated Panel (MPP) is typically used as a ceiling and wall treatment. Metal, acrylic, or timber panel with sub-millimetre perforations (0.
How much does Micro-Perforated Panel (MPP) reduce RT60?
Installing 20m² of MPP with 100mm cavity in a 100m³ room reduces RT60 by approximately 0.30s at 500Hz
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