WoodLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Odeon (Index 804)
4 mm asbestos or plywood boards fastened at random intervals (at least 0.4 * 0.6 m), over 75 mm cavity with 25 mm mineral wool
PTB reference data
Original description
4 mm asbestos or plywood boards fastened at random intervals (at least 0.4 * 0.6 m), over 75 mm cavity with 25 mm mineral wool
Material properties
Thickness: 4 mm
Wall distance: 75 mm
Dimensions: at least 0.4 × 0.6 m
Backing: 25 mm mineral wool
Mounting: fastened at random intervals
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.18
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.10 | 0.05 | 0.00 | 0.00 | 0.00 |
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Method (354): Measured