Spray-Applied Cellulose Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Recycled cellulose fibre mixed with adhesive binder and spray-applied directly to the substrate. Conforms to curved and irregular surfaces. Popular for industrial, retail, and heritage restoration projects where conventional panels are impractical.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.20 | 0.55 | 0.80 | 0.90 | 0.90 | 0.85 |
RT60 Impact
Installing 25m² of 25mm spray cellulose in a 100m³ room reduces RT60 by approximately 0.45s at 500Hz
Manufacturers & Brands
Frequently Asked Questions
What is the NRC of Spray-Applied Cellulose?
Spray-Applied Cellulose has an NRC (Noise Reduction Coefficient) of 0.80, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Spray-Applied Cellulose typically used?
Spray-Applied Cellulose is typically used as a ceiling and wall treatment. Recycled cellulose fibre mixed with adhesive binder and spray-applied directly to the substrate.
How much does Spray-Applied Cellulose reduce RT60?
Installing 25m² of 25mm spray cellulose in a 100m³ room reduces RT60 by approximately 0.45s at 500Hz
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