FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerunterlagen 1991
Value from the PTB table, not verified
illbruck illsonic waterproof PE foam waffle structure
illsonic waterproof waffle structure
PTB reference data
Original description
illbruck illsonic waterproof PE foam waffle structure
Material properties
Manufacturer: illbruck GmbH
Thickness: 2 in
Wall distance: 0 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.85
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.35 | 0.80 | 1.00 | 1.00 | 1.00 |
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Value from the PTB table, not verified
NRC: 0.85 (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 |
|---|---|---|---|---|---|---|---|
| 50 mm · 32 kg/m^3 · 0 · offenporige PE-Schaumkunststoff-Oberfläche | 0.85 | 0.17 | 0.36 | 0.82 | 1.12 | 1.01 | 1.05 |
Measured values as a table (1 measurement)
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