Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Type M-173 – Fibroplank
Original description
Wood fibers with portland cement binder, with 2 1/2 inch fiberglass batts in cavities between furring
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
