GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 b2.1-3
Perforated gypsum board with non-woven and mineral fiber mat
PTB reference data
Original description
Perforated gypsum board with non-woven and mineral fiber mat
Material properties
Thickness: 9.5 mm
Wall distance: 100 mm
Surface weight: 1.05 kg/cm²
Perforation: 19.6 %
Hole size: 15 mm
Backing: non-woven, 30 mm mineral fiber mat
Flow resistance: 12 Pa·s/m (non-woven), 750 Pa·s/m (mineral fiber mat)
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 | 0.75 | 1.00 | 0.80 | 0.65 | 0.60 |
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Method (354): Measured