TextileHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: RAMSETE
velvet curtains at 20 cm (C/B)
PTB reference data
Original description
velvet curtains at 20 cm (C/B)
Material properties
Wall distance: 20 cm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.34
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.30 | 0.45 | 0.50 | 0.40 |
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Method (354): Measured