PlasticHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: J.Meyer, Kirchenakustik, Verlag E.Bochinsky
Microporous two-layer foil roller blind, 5 cm cavity
PTB reference data
Original description
Microporous two-layer foil roller blind, 5 cm cavity
Material properties
Wall distance: 5 cm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.50
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.20 | 0.60 | 0.75 | 0.80 | 0.60 |
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Method (354): Measured