WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 157
Wilhelmi Variantex 05 wood fiber absorber
Wilhelmi acoustic panel – Variantex 05 (1981)
PTB reference data
Original description
Wilhelmi Variantex 05 wood fiber absorber
Material properties
Manufacturer: Wilhelmi Werke AG
Thickness: approx. 18 mm
Wall distance: 50 mm, 300 mm
Surface: fine chip layer with lacquer coating
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.64
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.75 | 0.75 | 0.60 | 0.55 | 0.60 | 0.60 |
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| Compare | Value | |
|---|---|---|
| 300 mm | αw0.64 | |
| 50 mm | αw0.57 |
Weight / density: 6 - 7,5 kg / m²