Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Original description
Seating, unoccupied, fabric-covered, padded, perforated seat undersides
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
