Mineral woolLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe
Ecophon Focus A/Gamma glass wool fiber absorber
Ecophon – Focus A/Gamma
PTB reference data
Original description
Ecophon Focus A/Gamma glass wool fiber absorber
Material properties
Manufacturer: Ecophon GmbH
Thickness: 20 mm
Wall distance: 200 mm
Backing: non-woven faced
Surface: Akutex T treated
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.33
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.50 | 0.40 | 0.45 | 0.30 | 0.20 |
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Method (354): Measured