MetalLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter www.ibp.fhg.de/rata
Fraunhofer IBP VPR-A1 compound plate resonator with Basotect
VPR – A1 with Basotect filling
PTB reference data
Original description
Fraunhofer IBP VPR-A1 compound plate resonator with Basotect
Material properties
Manufacturer: Fraunhofer IBP
Thickness: 100 mm
Backing: Basotect filling
Surface: painted or powder-coated steel sheet
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.51
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.80 | 0.95 | 0.80 | 0.55 | 0.35 | 0.30 |
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Method (354): Measured