Heavy Upholstered Seating Acoustic Properties \u2014 Absorption Coefficients (125Hz\u20134kHz)
Padded theatre or auditorium seating with fabric-covered foam cushions. Provides significant mid-high frequency absorption when unoccupied. Acoustic consultants design for the unoccupied condition to ensure worst-case compliance.
Absorption Coefficients by Octave Band
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α (absorption) | 0.15 | 0.30 | 0.50 | 0.65 | 0.70 | 0.65 |
RT60 Impact
200 upholstered seats in a 2,000m³ auditorium contribute approximately 0.15-0.25s reduction in RT60 at 500Hz (unoccupied)
Frequently Asked Questions
What is the NRC of Heavy Upholstered Seating?
Heavy Upholstered Seating has an NRC (Noise Reduction Coefficient) of 0.55, calculated as the arithmetic mean of absorption coefficients at 250, 500, 1000, and 2000 Hz per ASTM C423.
Where is Heavy Upholstered Seating typically used?
Heavy Upholstered Seating is typically used as a movable treatment. Padded theatre or auditorium seating with fabric-covered foam cushions.
How much does Heavy Upholstered Seating reduce RT60?
200 upholstered seats in a 2,000m³ auditorium contribute approximately 0.15-0.25s reduction in RT60 at 500Hz (unoccupied)
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