GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data www.knauf.de
Value from the PTB table, not verified
Knauf D 127 acoustic design panel, perforated drywall, 12/25Q, 23%
D 127 perforation 12/25Q
PTB reference data
Original description
Knauf D 127 acoustic design panel, perforated drywall, 12/25Q, 23%
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 12.5 mm + 20 mm mineral fiber
Wall distance: 60 mm, 400 mm
Perforation: 23%
Hole size: 12 mm
Backing: 20 mm mineral fiber, incl. standard non-woven
Mounting: on sub-frame
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.80
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 0.90 | 0.80 | 0.85 | 0.70 | 0.75 |
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| Compare | Value | |
|---|---|---|
| 400 mm | αw0.80 | |
| 60 mm | αw0.70 |
Weight / density: <15 kg / m²
Dimensions: 1200 mm x 2000 mm
Measured values as a table (2 measurements)
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12,5 mm + 20 mm Mineralfaser · <15 kg / m² · 400 mm | 0.80 | 0.50 | 0.65 | 0.95 | 0.93 | 0.96 | 0.85 | 0.80 | 0.76 | 0.88 | 0.90 | 0.88 | 0.83 | 0.78 | 0.70 | 0.68 | 0.70 | 0.79 |
| 12,5 mm + 20 mm Mineralfaser · <15 kg / m² · 60 mm | 0.70 | 0.16 | 0.28 | 0.20 | 0.40 | 0.47 | 0.65 | 0.95 | 1.06 | 1.12 | 1.10 | 0.89 | 0.80 | 0.67 | 0.54 | 0.52 | 0.61 | 0.67 |
Measured values as a table (2 measurements)
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