StoneLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter http://asonad.de, März 2002
Asona SOUNDBLOX Type C1 Helmholtz resonator made of hollow concrete block
Helmholtz resonator – SOUNDBLOX Type C1
PTB reference data
Original description
Asona SOUNDBLOX Type C1 Helmholtz resonator made of hollow concrete block
Material properties
Manufacturer: Asona Deutschland GmbH
Up to fire class: F-180
Application: exposed concrete masonry
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.60
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 0.95 | 0.40 | 0.35 | 0.55 | 0.65 |
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Method (354): Measured