On the source images method for sound propagation in a penetrable wedge: Some corrections and appendices

摘要

Some corrections and supplements for the source images method in the case of the penetrable wedge, proposed by Deane & Buckingham (1993), are introduced. The problem of sound propagation in a wedge-like waveguide is an important three-dimensional benchmark in underwater acoustics. Firstly, the formulae for positions of source images and bottom images are corrected. Secondly, a simple branch selection rule for the square root in the reflection coefficient is formulated and validated by several numerical tests. New examples, where the source images method is used to simulate time-harmonic acoustic fields and the pulse signal propagation, are presented.