GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 208
Knauf Perllit ceiling unit No. 3310 with sound-absorbing filling
Perllit ceiling unit with sound-absorbing filling – No. 3310
PTB reference data
Original description
Knauf Perllit ceiling unit No. 3310 with sound-absorbing filling
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 30 mm - 70 mm
Wall distance: 50 mm, 500 mm
Perforation: 11.6%
Hole size: 6 mm
Backing: mineral fiber filling, frame-like reinforced back with trickle protection, taped with aluminum foil
Application: ceiling
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.63
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.90 | 0.60 | 0.65 | 0.70 | 0.45 | 0.30 |
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| Compare | Value | |
|---|---|---|
| 500 mm | αw0.63 | |
| 50 mm | αw0.51 |
Weight / density: ca. 20 kg / m²
Dimensions: Länge 750 mm, width 335 - 415 mm