D. Keith Wilson
Dept. of Appl. Ocean Phys. and Eng., Woods Hole Oceanogr. Inst., Woods Hole, MA 02543
A numerical method for computing the sound field in a stratified, moving medium is described. The method also applies to moving sources. As suggested by Raspet et al. [J. Acoust. Soc. Am. 91, 498--500 (1992)], the wave equation is Fourier transformed in both horizontal coordinates, and the solution in the transformed space then is found using vertical finite elements. It is more convenient to formulate the solution in terms of the velocity potential rather than the acoustic pressure or velocity. The finite elements are determined using a global matrix method similar to the well known SAFARI program. Computational resources limit the maximal range of the solutions.