GypsumBroadband absorber

Data source

PTB reference data

Physikalisch-Technische Bundesanstalt

Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 195

Knauf Perllit acoustic tile No. 74

Perllit acoustic tile – No. 74

PTB reference data

Original description

Knauf Perllit acoustic tile No. 74

Material properties

Manufacturer: Knauf Hauptverwaltung Iphofen
Wall distance: 50 mm, 500 mm
Perforation: 5.8 %
Up to fire class: at least fire-retardant
Mounting: seamless installation

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 2 variants

αw
0.46

Frequency values

αp per ISO 11654

f (Hz)1252505001k2k4k
αp0.800.550.500.450.350.20

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500 mmαw0.46
50 mmαw0.41

Weight / density: ca. 16 kg / m²

Dimensions: 625 x 625 mm

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