Stone & concreteHighly absorbent
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 hollow concrete block
Helmholtz resonator – SOUNDBLOX Type D1
PTB reference data
Original description
Asona SOUNDBLOX Helmholtz resonator hollow concrete block
Material properties
Manufacturer: Asona Deutschland GmbH
Up to fire class: F-180
Mounting: exposed concrete masonry
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.55
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.50 | 0.90 | 0.75 | 0.50 | 0.45 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 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 | 0.55 | 0.15 | 0.19 | 0.20 | 0.33 | 0.46 | 0.71 | 0.90 | 0.92 | 0.81 | 0.74 | 0.83 | 0.67 | 0.62 | 0.48 | 0.45 | 0.46 | 0.44 | 0.38 | 0.25 | 0.12 |
Measured values as a table (1 measurement)
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