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Updated: Jun 25, 2026

A Stable Phantom Material for Optical and Acoustic Imaging
Published on: June 16, 2023
Numerical investigation of out-of-plane sound propagation in a shallow water experiment
Frédéric Sturm1, Sven Ivansson, Yong-Min Jiang
1LMFA UMR CNRS 5509, Ecole Centrale de Lyon, Ecully Cedex, France. frederic.sturm@ec-lyon.fr
Abstract:
In an experiment in the Florida Straits, broadband pulses were transmitted over a range of 10 km and received by a vertical hydrophone array. For pulses with center frequency below 400 Hz, the received signal consisted of a dominant arrival followed by a secondary one delayed by about 0.4 s. A hypothesis that the secondary arrival was caused by 3D out-of-plane propagation is investigated here numerically with a 3D parabolic equation model (3DWAPE) and a 3D ray model (MOC3D). Both models clearly predict a secondary arrival caused by 3D horizontal refraction from the sloping bottom in the shoreward direction.
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