GypsumBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 199
Knauf Perlgips perforated panel, Helmholtz absorber
Perlgips perforated panel – straight perforation 8/18
PTB reference data
Original description
Knauf Perlgips perforated panel, Helmholtz absorber
Material properties
Manufacturer: Knauf Hauptverwaltung Iphofen
Thickness: 9.5 mm
Wall distance: 53 mm, 500 mm
Perforation: 15.5%
Hole size: 8 mm
Backing: Paratex non-woven and 20 mm mineral fiber mat
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.67
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.80 | 0.70 | 0.70 | 0.70 | 0.60 | 0.55 |
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| Compare | Value | |
|---|---|---|
| 500 mm | αw0.67 | |
| 53 mm | αw0.54 |
Weight / density: ca. 7 kg / m²
Dimensions: 1250 x 2500 mm
