MetalLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Produktblatt des Herstellers
Kaefer VPR-Modul B2 (fiber-free compound panel resonator)
VPR-Modul B2
PTB reference data
Original description
Kaefer VPR-Modul B2 (fiber-free compound panel resonator)
Material properties
Manufacturer: Kaefer Isoliertechnik
Thickness: 100 mm
Surface: 2.5 mm steel front panel
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.74
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|
| αp | 0.95 | 0.85 | 0.80 | 0.60 | 0.45 |
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Method (354): Measured