AudienceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: JASA 104 (6) Dec 1998
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Amsterdam, Concertgebouw
PTB reference data
Original description
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Amsterdam, Concertgebouw
Material properties
Thickness: 1.5 cm (front of seat back), 2.5 cm (top of seat bottom)
Application: seating
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.56
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.55 | 0.60 | 0.60 | 0.60 | 0.60 |
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Method (354): Measured