A higher-order split-step Fourier parabolic-equation sound propagation solution scheme
Citable URI
https://hdl.handle.net/1912/5349As published
https://doi.org/10.1121/1.4730328DOI
10.1121/1.4730328Keyword
Acoustic waveguides; Helmholtz equations; Parabolic equations; Underwater acoustic propagationAbstract
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.
Description
Author Posting. © Acoustical Society of America, 2012. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 132 (2012): EL61-EL67, doi:10.1121/1.4730328.
Collections
Suggested Citation
Article: Lin, Ying-Tsong, Duda, Timothy F., "A higher-order split-step Fourier parabolic-equation sound propagation solution scheme", Journal of the Acoustical Society of America 132 (2012): EL61-EL67, DOI:10.1121/1.4730328, https://hdl.handle.net/1912/5349Related items
Showing items related by title, author, creator and subject.
-
A higher-order tangent linear parabolic-equation solution of three-dimensional sound propagation
(Acoustical Society of America, 2013-07-15)A higher-order square-root operator splitting algorithm is employed to derive a tangent linear solution for the three-dimensional parabolic wave equation due to small variations of the sound speed in the medium. The solution ... -
Bottom interacting sound at 50 km range in a deep ocean environment
(Acoustical Society of America, 2012-10)Data collected during the 2004 Long-range Ocean Acoustic Propagation Experiment provide absolute intensities and travel times of acoustic pulses at ranges varying from 50 to 3200 km. In this paper a subset of these data ... -
Analysis and modeling of broadband airgun data influenced by nonlinear internal waves
(Acoustical Society of America, 2004-12)To investigate acoustic effects of nonlinear internal waves, the two southwest tracks of the SWARM 95 experiment are considered. An airgun source produced broadband acoustic signals while a packet of large nonlinear internal ...
