FoamBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data unter http://www.optac.de, Feb. 2001
Value from the PTB table, not verified
OPTACust Skinplan polyurethane flexible foam
OPTACust Skinplan OCP-SKINP-25
PTB reference data
Original description
OPTACust Skinplan polyurethane flexible foam
Material properties
Manufacturer: Siesta Akustik GmbH
Thickness: 1 in
Wall distance: 0 in
Application: lining of machine housings
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.25
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.20 | 0.20 | 0.20 | 0.50 | 0.40 |
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Value from the PTB table, not verified
NRC: 0.25 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 25 mm · 25 kg / m^3 · 0 · Aufkleben · geschlossenporig durch staubdichten Überzug with PU-Haut | 0.25 | 0.08 | 0.18 | 0.18 | 0.22 | 0.50 | 0.40 |
Measured values as a table (1 measurement)
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