Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter http://asonad.de, Feb. 2001
Helmholtz resonator – SOUNDBLOX Type A
Original description
Asona Soundblox Type A Helmholtz resonator hollow concrete block
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
