Stone & concreteLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data unter http://asonad.de, March 2002
Value from the PTB table, not verified
Asona Soundblox Helmholtz resonator Type N2-X
Helmholtz resonator – SOUNDBLOX Type N2-X
PTB reference data
Original description
Asona Soundblox Helmholtz resonator Type N2-X
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
0.80
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.90 | 0.95 | 0.90 | 0.85 | 0.70 | 0.70 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 63 Hz | 80 Hz | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz | 6300 Hz | 8000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.80 | 0.12 | 0.19 | 0.57 | 0.98 | 1.10 | 0.97 | 1.00 | 0.87 | 0.81 | 0.86 | 0.98 | 0.93 | 0.83 | 0.74 | 0.71 | 0.70 | 0.73 | 0.74 | 0.67 | 0.67 | 0.64 | 0.64 |
Measured values as a table (1 measurement)
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