FoamHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 189
Value from the PTB table, not verified
Idikell PU convoluted foam absorber mat M 8041/30
Idikell absorber mat – M 8041/30
PTB reference data
Original description
Idikell PU convoluted foam absorber mat M 8041/30
Material properties
Manufacturer: Siegfried Keller AG
Thickness: 1.2 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.30
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.15 | 0.20 | 0.30 | 0.55 | 0.80 |
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Value from the PTB table, not verified
NRC: 0.30 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 30 mm · 0,6 kg / m² | 0.30 | 0.09 | 0.10 | 0.11 | 0.12 | 0.15 | 0.18 | 0.20 | 0.22 | 0.24 | 0.27 | 0.39 | 0.47 | 0.60 | 0.64 | 0.73 | 0.78 | 0.88 |
Measured values as a table (1 measurement)
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