Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter http://asonad.de, März 2002
Helmholtz resonator – SOUNDBLOX Type E2
Original description
Soundblox Type E2 hollow concrete block with Helmholtz resonators
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
