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 slotline B6 slotted gypsum board with mineral fiber
D 127 slotline B6
PTB reference data
Original description
Knauf D 127 slotline B6 slotted gypsum board with mineral fiber
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 12.5 mm + 20 mm mineral fiber
Wall distance: 400 mm, 60 mm
Perforation: 15.7%
Backing: 20 mm mineral fiber
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.65
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.90 | 0.75 | 0.75 | 0.55 | 0.55 |
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| Compare | Value | |
|---|---|---|
| 400 mm | αw0.65 | |
| 60 mm | αw0.55 |
Weight / density: <15 kg / m²
Dimensions: 1200 mm x 2400 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 | 0.65 | 0.50 | 0.56 | 0.87 | 0.97 | 0.94 | 0.80 | 0.74 | 0.71 | 0.80 | 0.78 | 0.76 | 0.70 | 0.60 | 0.56 | 0.54 | 0.53 | 0.57 |
| 12,5 mm + 20 mm Mineralfaser · <15 kg / m² · 60 mm | 0.55 | 0.19 | 0.27 | 0.35 | 0.54 | 0.61 | 0.80 | 1.00 | 1.05 | 1.00 | 0.92 | 0.80 | 0.65 | 0.57 | 0.48 | 0.42 | 0.41 | 0.40 |
Measured values as a table (2 measurements)
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