Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 209
Perllit ceiling element with sound-absorbing filling – No. 3320
Original description
Knauf Perllit ceiling element No. 3320 with mineral fiber filling
ISO 354 – reverberation chamber· 2 variants
αp per ISO 11654
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| Compare | Value | |
|---|---|---|
| 500 mm | αw0.45 | |
| 50 mm | αw0.35 |
Weight / density: ca. 20 kg / m²
Dimensions: Länge 750 mm, width 335 - 415 mm
