Abstract
In predicting wave propagation in either direction, the size of the angle of propagation plays an important role; thus, the concept of wide-angle is introduced. Most existing acoustic propagation prediction models do have the capability of treating the wide-angle but the treatment, in practice, is vertical. This is desirable for solving 2-dimensional (range and depth) problems. In extending the 2-dimensional treatment to 3 dimensions, even the wide-angle capability is maintained in most 3-D models, it is still vertical. This paper uses an azimuthal wide-angle wave equation. The 3-D benchmarking is done by a 3-dimensional azimuthal wide-angle model with real 3-D side-wall boundaries for up-slope calculations. The cross-slope calculations are also done for both subcases. [Work supported by National Science Council of Republic of China.]
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