Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe im Internet unter www.bausteine-briest.de, 01.02.2001
Liakustik, Liapor 1-4
Original description
Liakustik Liapor sound absorber blocks for track construction
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
