GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 b 2.1-1 (a)
Value from the PTB table, not verified
Perforated gypsum board, 12.5 mm thick, 20.2% open area, 12/20 mm holes
PTB reference data
Original description
Perforated gypsum board, 12.5 mm thick, 20.2% open area, 12/20 mm holes
Material properties
Thickness: 12.5 mm
Wall distance: 30 mm
Dimensions: 625 x 625 mm
Perforation: 20.2%
Hole size: 12 mm, 20 mm
Mounting: batten construction
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.15
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.10 | 0.20 | 0.10 | 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 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12,5 mm · 30 mm · Montiert on Lattenkonstruktion im grid von 625 x 625 mm, Air cavity 30 mm · 20,2 % Lochflächenanteil, Lochdurchmesser 12 mm and 20 mm (gleiche Anzahl, regelmäßig | 0.15 | 0.02 | 0.03 | 0.10 | 0.08 | 0.05 | 0.10 | 0.08 | 0.06 | 0.20 | 0.25 | 0.22 | 0.13 | 0.11 | 0.10 | 0.08 | 0.05 | 0.10 | 0.18 |
Measured values as a table (1 measurement)
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