GypsumLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, c1-7
Gypsum board on sub-frame
PTB reference data
Original description
Gypsum board on sub-frame
Material properties
Thickness: 12.5 mm
Wall distance: 100 mm
Dimensions: 1500 × 1250 mm
Surface weight: 11 kg/m²
Mounting: on sub-frame
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.05
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.10 | 0.05 | 0.05 | 0.05 | 0.05 |
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Method (354): Measured