WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 154
Value from the PTB table, not verified
Wilhelmi Mikropor ST acoustic panel (chipboard, non-woven, lacquer)
Wilhelmi acoustic panel – Mikropor ST (1981)
PTB reference data
Original description
Wilhelmi Mikropor ST acoustic panel (chipboard, non-woven, lacquer)
Material properties
Manufacturer: Wilhelmi Werke AG
Thickness: approx. 0.7 in
Wall distance: 2 in
Backing: acoustic non-woven
Surface: matte spotted lacquer coating
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.60
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.40 | 0.55 | 0.80 | 0.70 | 0.65 |
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Value from the PTB table, not verified
NRC: 0.60 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ca. 18 mm · 6 - 7,5 kg / m² · 50 mm · acoustic fleece, matte getupfte Lackauflage | 0.60 | 0.10 | 0.14 | 0.32 | 0.39 | 0.38 | 0.40 | 0.42 | 0.54 | 0.66 | 0.72 | 0.86 | 0.87 | 0.80 | 0.65 | 0.61 | 0.65 | 0.68 | 0.65 | 0.64 |
Measured values as a table (1 measurement)
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