A higher-order split-step Fourier parabolic-equation sound propagation solution scheme.
A three-dimensional Cartesian parabolic-equation model with a higher-order approximation to the square-root Helmholtz operator is presented for simulating underwater sound propagation in ocean waveguides. The higher-order approximation includes cross terms with the free-space square-root Helmholtz operator and the medium phase speed anomaly. It can be implemented with a split-step Fourier algorithm to solve for sound pressure in the model. Two idealized ocean waveguide examples are presented to demonstrate the performance of this numerical technique.
Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA. ytlin@whoi.edu
Ying-Tsong
YT
Lin
Timothy F
TF
Duda
D000162:Acoustics; D003198:Computer Simulation; D005583:Fourier Analysis; D016014:Linear Models; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D009792:Oceans and Seas; D011312:Pressure; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014867:Water
D014867:Water