Abstract

Acoustic vector intensity contains more information about sound propagation than standard pressure measurements. This fact motivates the characterization of sound propagation in an acrylic rectangular water tank with dimensions of 3.6 × 1.2 m2 and a maximum depth of 0.91 m, contained in the Underwater Acoustics Lab at Brigham Young University. With the acquisition of an M20-040 Particle Motion Sensor from GeoSpectrum Technologies Inc, comparisons are made between the p-p and the p-u methods of calculating intensity as a function of frequency and source-receiver range. In addition, the decrease in intensity is quantified when Apltile SF5048 anechoic panels made by Precision Acoustics are used to line the side of the tank. This work helps characterize the impact of panels on sound propagation in the tank. The continuation of research on acoustic vector intensity will also allow for future research collaboration with biologists at BYU to make important measurements relating to the effects of sound intensity on the auditory responses of fish.

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