GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.1-10
Value from the PTB table, not verified
Perforated drywall cassette with glass veil (DNA 1968, b2.1-10)
PTB reference data
Original description
Perforated drywall cassette with glass veil (DNA 1968, b2.1-10)
Material properties
Wall distance: 100 mm
Perforation: 0.5 %
Hole size: 6 mm
Backing: glass veil
Mounting: 50/50 battening on 550 mm x 1150 mm grid
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.05
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.25 | 0.10 | 0.05 | 0.00 | 0.10 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 mm | 0.05 | 0.22 | 0.32 | 0.35 | 0.38 | 0.24 | 0.18 | 0.15 | 0.12 | 0.03 | 0.05 | 0.02 | 0.05 | 0.02 | 0.01 | 0.02 | 0.05 | 0.14 | 0.08 | 0.13 |
Measured values as a table (1 measurement)
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