Abstract:When attempting to make meaningful measurements, airborne ultrasound in the 20 kHz to 100 kHz frequency range presents several significant challenges. These include source and sensor directivity, low signal-to-noise ratios, the inaudible nature of such sounds, and the lack of widespread literature on the subject. For each of these challenges, the practical impacts versus conventional acoustic measurements are identified and discussed. Solutions and suggestions are presented to allow reliable and repeatable mea… Show more
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