FoamHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter http://www.optac.de, Feb. 2001
OPTACust Noppe OCP-NOP-50 polyurethane foam
OPTACust Noppe OCP-NOP-50
PTB reference data
Original description
OPTACust Noppe OCP-NOP-50 polyurethane foam
Material properties
Manufacturer: SINOtec GmbH
Thickness: 50 mm
Wall distance: 0 mm
Application: ceiling, machine housing
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.59
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.20 | 0.50 | 0.80 | 0.90 | 1.00 |
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Method (354): Measured
