GypsumLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 b2.1-8
Value from the PTB table, not verified
Perforated gypsum board with non-woven and mineral fiber, spacing 400 mm
PTB reference data
Original description
Perforated gypsum board with non-woven and mineral fiber, spacing 400 mm
Material properties
Thickness: 9.5 mm
Wall distance: 400 mm
Perforation: 6 %
Hole size: 8 mm, 15 mm, 20 mm
Backing: non-woven, mineral fiber
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.35
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.65 | 0.50 | 0.45 | 0.25 | 0.25 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9,5 mm · Mineralfasermatte: 1.05Kg/cm^2, · 400 mm · Schichtaufbau: 9,5 mm-Gipskarton-Lochplatte with rückseitigem Faservlies, 30 mm-Mineralfasermatte, Drahtgitter, Abstand hintere Gipsplattenseite/Wand: 400 mm. Unterkonstruktion: Lattung on Abstandklötzen, Prüffläche seitlich geschlossen · Lochflächenanteil 6 %, Lochdurchmesser 8 mm, 15 mm, 20 mm unregelmäßig verteilt | 0.35 | 0.62 | 0.66 | 0.70 | 0.63 | 0.69 | 0.59 | 0.50 | 0.45 | 0.50 | 0.50 | 0.47 | 0.40 | 0.30 | 0.28 | 0.24 | 0.26 | 0.23 | 0.25 | 0.20 |
Measured values as a table (1 measurement)
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