Sound Propagation in Wedge-Shaped Ocean Channels.

Available from UMI in association with The British Library. The work in this thesis is to study the field generated by a harmonic point source in a wedge shaped ocean channel. Uniformly asymptotic approximations of Buckingham's theoretical models for perfect wedge and penetrable wedge are obtained by stationary phase method. The approximate representations can be used to predict the fields in perfect and penetrable wedges rapidly with a satisfactory accuracy compared with numerical evaluation of the exact solutions. Theoretical results are presented for the fields in perfect wedges and penetrable wedges. An experiment is carried out in a laboratory tank to measure in 3-dimensions the sound pressure fields for a source far away from the apex both in the water and in the bottom in wedge shaped water channels with a sand bottom. Comparisons are made between the experimental results and the theoretical results.