AudienceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: JASA 104 (6) Dec 1998
Medium upholstered chair, unoccupied, front side of seat back 2.5 cm, rear side of seat back 0, top of seat bottom 5 cm, arm rests solid, Stuttgart, Liederhalle
PTB reference data
Original description
Medium upholstered chair, unoccupied, front side of seat back 2.5 cm, rear side of seat back 0, top of seat bottom 5 cm, arm rests solid, Stuttgart, Liederhalle
Material properties
Thickness: 2.5 cm (seat back front), 5 cm (seat surface)
Application: unoccupied
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.67
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.75 | 0.80 | 0.70 | 0.65 | 0.60 | 0.50 |
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Method (354): Measured