Physikalisch-Technische Bundesanstalt
Source: Sound System Engineering, Don Davis and Carolyn Davis
Original description
Rockwool blanket, 4 inch thick batt (Full-Thick), covered with 3/16 inch thick perforated cement asbestos board (Transite), 11% open area, mounted over 2 inch air space
ISO 354 – reverberation chamber
αp nach ISO 11654
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Method (354): Measured
