GypsumHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data www.knauf.de
Value from the PTB table, not verified
Knauf Acoustic Design Panel D 127, 12/25R perforation
Acoustic Design Panel – D 127 Perforation 12/25R
PTB reference data
Original description
Knauf Acoustic Design Panel D 127, 12/25R perforation
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 12.5 mm (drywall), 20 mm (mineral fiber)
Wall distance: 60 mm, 400 mm
Perforation: 18.1%
Hole size: 12 mm
Backing: 20 mm mineral fiber, incl. standard acoustic non-woven
Mounting: on sub-frame
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.75
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.75 | 0.90 | 0.80 | 0.80 | 0.65 | 0.65 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | |
|---|---|---|
| 400 mm | αw0.75 | |
| 60 mm | αw0.60 |
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 | 0.75 | 0.56 | 0.67 | 0.98 | 0.91 | 0.92 | 0.82 | 0.76 | 0.75 | 0.86 | 0.87 | 0.84 | 0.75 | 0.72 | 0.62 | 0.59 | 0.60 | 0.73 |
| 12,5 mm + 20 mm Mineralfaser · <15 kg / m² · 60 mm | 0.60 | 0.18 | 0.29 | 0.22 | 0.40 | 0.51 | 0.79 | 0.99 | 1.12 | 1.11 | 1.03 | 0.85 | 0.70 | 0.60 | 0.45 | 0.45 | 0.52 | 0.58 |
Measured values as a table (2 measurements)
Access frequency bands, variants and export. Create a permanent free account
Last updated: