GypsumLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 b2.1-8
Perforated gypsum board with non-woven and mineral fiber
PTB reference data
Original description
Perforated gypsum board with non-woven and mineral fiber
Material properties
Thickness: 9.5 mm
Wall distance: 400 mm
Perforation: 6 %
Hole size: 8 mm, 15 mm, 20 mm
Backing: non-woven, mineral fiber
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.46
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.65 | 0.50 | 0.45 | 0.25 | 0.25 |
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Method (354): Measured