MetalLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Produktblatt des Herstellers
Kaefer VPR-Modul A1 fiber-free plate resonator
VPR-Modul A1
PTB reference data
Original description
Kaefer VPR-Modul A1 fiber-free plate resonator
Material properties
Manufacturer: Kaefer Isoliertechnik
Thickness: 100 mm
Surface: 1 mm steel
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.58
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|
| αp | 0.90 | 0.75 | 0.65 | 0.50 | 0.35 |
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Method (354): Measured