StoneLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter http://asonad.de, März 2002
Asona Soundblox Helmholtz resonator Type C2
Helmholtz resonator – SOUNDBLOX Type C2
PTB reference data
Original description
Asona Soundblox Helmholtz resonator Type C2
Material properties
Manufacturer: Asona Deutschland GmbH
Up to fire class: F-180
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.75
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 1.05 | 0.85 | 0.70 | 0.60 | 0.60 |
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Method (354): Measured