Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 203
Perlgips perforated gypsum board – staggered perforation 12/20/46
Original description
Knauf Perlgips perforated gypsum board, staggered perforation 12/20/46
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
