Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 68
irregularly perforated
Original description
AMF Thermatex mineral fiber panel, irregularly perforated
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
