WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe im Internet, mit Verweis auf ita-Prüfzeugnis, 14.11.2000
Wilhelmi Variante X FWA acoustic system, seamless
Variante X FWA Normalstruktur
PTB reference data
Original description
Wilhelmi Variante X FWA acoustic system, seamless
Material properties
Manufacturer: Wilhelmi Werke AG
Wall distance: 200 mm
Surface: Wilhelmi acoustic plaster, grain size K 3.0
Application: ceiling, wall
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.57
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 0.45 | 0.60 | 0.70 | 0.70 | 0.50 |
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Method (354): Measured