GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Value from the PTB table, not verified
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
0.70
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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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 100 mm · hinterlegt with Faserflies 12 Rayl, Mineralfasermatte 1,05 kg/m^2, 7,5 Rayl · 19,6% Lochfächenanteil, 15mm Lochdurchmesser | 0.70 | 0.30 | 0.69 | 1.01 | 0.81 | 0.66 | 0.62 |
Measured values as a table (1 measurement)
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