Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Original description
Perforated steel panel backed by 4 inch layer of 3 1/2 pcf USG Thermafiber in Mylar
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
