FabricHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data
Value from the PTB table, not verified
mbakustik curtain Type AV 22, 2-layer, B1
Type AV 22
PTB reference data
Original description
mbakustik curtain Type AV 22, 2-layer, B1
Material properties
Manufacturer: mbakustik
Wall distance: 0.30 m
Up to fire class: not easily flammable (B1)
Mounting: 0.30 m in front of reverberation chamber wall
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.85
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.60 | 0.85 | 1.00 | 1.00 | 1.00 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 720g/m² · 0,30m | 0.85 | 0.14 | 0.23 | 0.35 | 0.39 | 0.61 | 0.76 | 0.82 | 0.83 | 0.89 | 0.98 | 1.03 | 1.08 | 1.09 | 1.09 | 1.12 | 1.16 | 1.20 | 1.20 |
Measured values as a table (1 measurement)
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