GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Perforated gypsum board, 19.6% open area, 15 mm hole diameter, 100 mm cavity
PTB reference data
Original description
Perforated gypsum board, 19.6% open area, 15 mm hole diameter, 100 mm cavity
Material properties
Wall distance: 100 mm
Perforation: 19.6%
Hole size: 15 mm
Backing: Fiber non-woven 12 Rayl, mineral fiber mat 1.05 kg/m², 7.5 Rayl
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.68
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.70 | 1.00 | 0.80 | 0.65 | 0.60 |
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Method (354): Measured