GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe www.knauf.de
Knauf D 127 perforated gypsum board with mineral fiber
D 127 perforation 12/20/35R
PTB reference data
Original description
Knauf D 127 perforated gypsum board with mineral fiber
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 12.5 mm (gypsum board), 20 mm (mineral fiber)
Wall distance: 60 mm, 400 mm
Perforation: 9.8%
Backing: 20 mm mineral fiber, standard non-woven
Mounting: on sub-frame
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.57
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 0.80 | 0.65 | 0.55 | 0.35 | 0.40 |
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| Compare | Value | |
|---|---|---|
| 400 mm | αw0.57 | |
| 60 mm | αw0.51 |
Weight / density: <15 kg / m²
Dimensions: 1200 mm x 1875/2500 mm