FoamHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 99
Value from the PTB table, not verified
Faist empfa-Dämmstoff M 507/20/1.5 polyether foam
empfa-Dämmstoff – M 507/20/1,5
PTB reference data
Original description
Faist empfa-Dämmstoff M 507/20/1.5 polyether foam
Material properties
Manufacturer: Faist Automotive GmbH & Co. KG
Thickness: approx. 21 mm
Wall distance: 0 mm
Surface: thermoplastic coating
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.20
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.05 | 0.10 | 0.25 | 0.65 | 0.80 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ca. 21 mm · ca. 3,3 kg / m² · 0 | 0.20 | 0.03 | 0.04 | 0.05 | 0.06 | 0.06 | 0.07 | 0.07 | 0.13 | 0.19 | 0.23 | 0.39 | 0.52 | 0.66 | 0.73 | 0.80 | 0.84 |
Measured values as a table (1 measurement)
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