WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Odeon (Index 1005)
3.5-4 mm boards (asbestos, plywood or hard fiberboard), 13% perforation
PTB reference data
Original description
3.5-4 mm boards (asbestos, plywood or hard fiberboard), 13% perforation
Material properties
Thickness: 3.5-4 mm
Wall distance: 25 mm
Perforation: approx. 13%
Hole size: 4.5-5 mm
Backing: 25 mm mineral wool
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.40
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.05 | 0.20 | 0.20 | 0.15 | 0.15 |
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Method (354): Measured