Reference: audienceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Odeon (Index 906)
Value from the PTB table, not verified
Empty chairs, upholstered with cloth cover
PTB reference data
Original description
Empty chairs, upholstered with cloth cover
Material properties
No further information available.
Measurement data
Sound absorption
ISO 354 – reverberation chamber
Values per m² of audience area, not per chair or person.
αw
0.30
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.20 | 0.25 | 0.30 | 0.25 | 0.25 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 63 Hz | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz | 6300 Hz | 8000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.30 | 0.44 | 0.00 | 0.44 | 0.00 | 0.00 | 0.60 | 0.00 | 0.00 | 0.77 | 0.00 | 0.00 | 0.89 | 0.00 | 0.00 | 0.82 | 0.00 | 0.00 | 0.70 | 0.00 | 0.00 | 0.70 |
Measured values as a table (1 measurement)
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