WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data im Internet, mit Verweis auf ita-Prüfzeugnis, 14.11.2000
Value from the PTB table, not verified
Wilhelmi Variante X wood acoustic panel (series 2)
Variante X
PTB reference data
Original description
Wilhelmi Variante X wood acoustic panel (series 2)
Material properties
Manufacturer: Wilhelmi Werke AG
Wall distance: 16 in
Surface: natural or Wilhelmi acoustic color 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 | 0.45 | 0.50 | 0.55 | 0.65 | 0.70 | 0.60 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.60 | 0.45 | 0.56 | 0.32 | 0.42 | 0.55 | 0.50 | 0.53 | 0.50 | 0.55 | 0.56 | 0.66 | 0.69 | 0.70 | 0.69 | 0.65 | 0.63 | 0.58 | 0.62 |
Measured values as a table (1 measurement)
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