Propagation Loss as Predicted by Modified Ray Theory.
WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS
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Modified ray theory predicts a frequency dependent distortion of the sound field which is obtained by ordinary ray theory. One qualitative consequence of this distortion is the introduction of a caustic in problems where ray theory predicts a shadow boundary. In order to test this approximate theory and determine the significance of such effects, a computer program has been developed which computes propagation loss for a variety of problems which, while simple, are pertinent to underwater sound propagation. The results of a numerical investigation of propagation loss vs. range are presented as a function of frequency, material properties, and boundary conditions unbounded, pressure release surface, and rigid boundary. Comparisons are made with ray theory and available exact solutions. Author
- Acoustic Detection and Detectors