GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe www.knauf.de
Knauf acoustic design panel D 127, perforated gypsum board
D 127 Lochung 8/15/20R
PTB reference data
Original description
Knauf acoustic design panel D 127, perforated gypsum board
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 12.5 mm, 20 mm mineral fiber
Wall distance: 60 mm, 400 mm
Perforation: 9.9%
Hole size: 8 mm, 15 mm, 20 mm
Backing: 20 mm mineral fiber, standard acoustic non-woven
Mounting: on sub-frame
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.61
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 0.85 | 0.70 | 0.60 | 0.40 | 0.45 |
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| Compare | Value | |
|---|---|---|
| 400 mm | αw0.61 | |
| 60 mm | αw0.54 |
Weight / density: <15 kg / m²
Dimensions: 1200 mm x 1875/2500 mm