WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 155
Wilhelmi Mikropor UB acoustic panel made of vermiculite
Wilhelmi-Akustikplatte – Mikropor UB (1981)
PTB reference data
Original description
Wilhelmi Mikropor UB acoustic panel made of vermiculite
Material properties
Manufacturer: Wilhelmi Werke AG
Thickness: approx. 15 mm
Wall distance: 48 mm
Surface: acoustic non-woven, fine-pored special coating
Up to fire class: non-combustible
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.48
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.45 | 0.70 | 0.50 | 0.45 | 0.55 |
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Method (354): Measured