GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe www.knauf.de
Knauf Twin D 123 acoustic design panel with mineral fiber insulation
Knauf Twin – D 123 perforation 15/30
PTB reference data
Original description
Knauf Twin D 123 acoustic design panel with mineral fiber insulation
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 12.5 mm, 12.5 mm
Wall distance: 358 mm
Perforation: straight-drilled round perforation
Backing: 20 mm mineral fiber insulation incl. standard non-woven
Up to fire class: F30A
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.66
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.50 | 0.90 | 1.00 | 0.75 | 0.65 |
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Method (354): Measured