GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 b 2.1-1 (a)
Perforated gypsum board, 12.5 mm thick, 20.2% open area, 12/20 mm holes
PTB reference data
Original description
Perforated gypsum board, 12.5 mm thick, 20.2% open area, 12/20 mm holes
Material properties
Thickness: 12.5 mm
Wall distance: 30 mm
Dimensions: 625 x 625 mm
Perforation: 20.2%
Hole size: 12 mm, 20 mm
Mounting: batten construction
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.11
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.10 | 0.20 | 0.10 | 0.10 |
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Method (354): Measured