FoamHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 100
Faist Automotive empfa-Dämmstoff M 638 polyether foam absorber
empfa-Dämmstoff – M 638
PTB reference data
Original description
Faist Automotive empfa-Dämmstoff M 638 polyether foam absorber
Material properties
Manufacturer: Faist Automotive GmbH & Co. KG
Thickness: approx. 13 mm
Wall distance: 0 mm
Backing: 2 mm bitumen-free damping compound
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.22
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.05 | 0.10 | 0.20 | 0.35 | 0.60 |
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Method (354): Measured