Physikalisch-Technische Bundesanstalt
Source: Dalenbäck, Datensatz der CATT-Software, November 2000. Data-Category in CATT: PLASTER9, C: Ceilings, D: Perf.
Original description
Ceilings, perf. 27 mm gypsum board (16%), d = 4.5 mm 300 mm from ceiling
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
