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 block-pattern perforation with round holes 8/18R Design B4
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: 400 mm, 60 mm
Perforation: 12.1%
Hole size: 8 mm
Backing: 20 mm mineral fiber
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.69
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.60 | 0.75 | 0.65 | 0.70 | 0.60 | 0.60 |
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| Compare | Value | |
|---|---|---|
| 400 mm | αw0.69 | |
| 60 mm | αw0.61 |
Weight / density: <15 kg / m²
Dimensions: 1224 mm x 2448 mm