Acoustic Plaster System Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Seamless spray-applied or trowel-applied acoustic plaster system over a perforated or slotted substrate with mineral wool backing. Achieves high absorption while maintaining a smooth monolithic plaster aesthetic.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.15 | 0.45 | 0.70 | 0.85 | 0.80 | 0.75 |
RT60 Impact
Installing 20m² of acoustic plaster ceiling in a 100m³ room reduces RT60 by approximately 0.35s at 500Hz
Manufacturers & Brands
Frequently Asked Questions
What is the NRC of Acoustic Plaster System?
Acoustic Plaster System has an NRC (Noise Reduction Coefficient) of 0.70, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Acoustic Plaster System typically used?
Acoustic Plaster System is typically used as a ceiling and wall treatment. Seamless spray-applied or trowel-applied acoustic plaster system over a perforated or slotted substrate with mineral wool backing.
How much does Acoustic Plaster System reduce RT60?
Installing 20m² of acoustic plaster ceiling in a 100m³ room reduces RT60 by approximately 0.35s at 500Hz
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