Abstract
Transmission loss measurements of building materials at audible frequencies are commonly made using various techniques such as plane wave tubes. These measurements provide vital information for control of noise isolation in architectural acoustics. To our knowledge, however, not much has been done to explore airborne ultrasonic sound transmission through common building materials. This paper will present various measurements of the ultrasonic transmission loss for various building materials over a frequency range of 20–200 kHz. The materials include fir plywood, particle board, medium density fiberboard, styrofoam, galvanized steel, and acrylic and polycarbonate plastics. This presentation will also discuss the challenges involved in making such measurements.
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