Heavily upholstered chair, unoccupied, front side of seat back 7.5 cm, rear side of seat back sometimes, top of seat bottom 10 cm, arm rests 2 cm, Berlin, Philharmonie – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

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Data source

PTB reference data

Physikalisch-Technische Bundesanstalt

Source: JASA 104 (6) Dec 1998

Heavily upholstered chair, unoccupied, front side of seat back 7.5 cm, rear side of seat back sometimes, top of seat bottom 10 cm, arm rests 2 cm, Berlin, Philharmonie

PTB reference data

Original description

Material properties

Dimensions: front side of seat back 7.5 cm, rear side of seat back sometimes, top of seat bottom 10 cm, arm rests 2 cm

Application: unoccupied chair

Measurement data

Sound absorption

ISO 354 – reverberation chamber

αw

0.81

Frequency values

αp nach ISO 11654

125 Hz

0.80

250 Hz

0.95

500 Hz

0.85

1000 Hz

0.85

2000 Hz

0.75

4000 Hz

0.70

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Method (354): Measured

Acoustic Index

The database for acoustic material data. Professional measurement results per ISO standards.

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