FoamBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerunterlagen 1991
Value from the PTB table, not verified
illbruck illsonic waterproof PE foam resonator panel
illsonic waterproof Resonator-Struktur
PTB reference data
Original description
illbruck illsonic waterproof PE foam resonator panel
Material properties
Manufacturer: illbruck GmbH
Thickness: 55 mm
Wall distance: 50 mm
Surface: closed-cell with resonator structure
Application: hygiene area
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.40
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.30 | 0.40 | 0.35 | 0.85 | 0.30 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 55 mm · 33 kg/m^3 · 50 mm · 100% geschlossenporige PE-Schaumkunststoff-Oberfläche. Rippenstruktur with Hohlräumen | 0.40 | 0.09 | 0.29 | 0.41 | 0.37 | 0.86 | 0.28 |
Measured values as a table (1 measurement)
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