WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 153
Value from the PTB table, not verified
Wilhelmi Mikropor ST wood wool acoustic panel
Wilhelmi-Akustikplatte – Mikropor ST (1981)
PTB reference data
Original description
Wilhelmi Mikropor ST wood wool acoustic panel
Material properties
Manufacturer: Wilhelmi Werke AG
Thickness: approx. 0.8 in
Wall distance: 1.9 in
Surface: Mikropor foil with lacquer coating
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.15
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.20 | 0.15 | 0.10 | 0.10 | 0.15 |
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Value from the PTB table, not verified
NRC: 0.15 (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. 20 mm · 8 kg / m² · 48 mm · optisch wie Mikropor S | 0.15 | 0.18 | 0.28 | 0.30 | 0.23 | 0.22 | 0.18 | 0.15 | 0.14 | 0.09 | 0.11 | 0.09 | 0.10 | 0.10 | 0.12 | 0.14 | 0.14 | 0.14 | 0.14 | 0.17 |
Measured values as a table (1 measurement)
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