Reference: audienceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Value from the PTB table, not verified
Seating, unoccupied, moderately upholstered, 0.90 m x 0.55 m
PTB reference data
Original description
Seating, unoccupied, moderately upholstered, 0.90 m x 0.55 m
Material properties
Dimensions: 0.90 m x 0.55 m
Measurement data
Sound absorption
ISO 354 – reverberation chamber
Values per m² of audience area, not per chair or person.
αw
0.75
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.45 | 0.55 | 0.65 | 0.75 | 0.85 | 0.85 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz | 6300 Hz |
|---|---|---|---|---|---|---|---|---|
| mäßig gepolstert | 0.75 | 0.44 | 0.56 | 0.67 | 0.74 | 0.83 | 0.87 | 0.80 |
Measured values as a table (1 measurement)
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