GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 210
Knauf Perllit ceiling element No. 3350 with mineral fiber filling
Perllit ceiling element with sound-absorbing filling – No. 3350
PTB reference data
Original description
Knauf Perllit ceiling element No. 3350 with mineral fiber filling
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 30 mm, 70 mm
Wall distance: 100 mm, 700 mm
Hole size: 4.5 mm, 6 mm, 8 mm
Backing: mineral fiber filling, anti-fall protection, aluminum foil
Application: ceiling
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.59
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.75 | 0.70 | 0.65 | 0.60 | 0.40 | 0.45 |
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| Compare | Value | |
|---|---|---|
| 700 mm | αw0.59 | |
| 100 mm | αw0.50 |
Weight / density: ca. 19 kg / m²
Dimensions: Länge 625 mm, width 335 - 469 mm