Numerical investigation of out-of-plane sound propagation in a shallow water experiment

J Acoust Soc Am. 2008 Dec;124(6):EL341-6. doi: 10.1121/1.3008068.

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.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Computer Simulation*
  • Data Compression
  • Florida
  • Geologic Sediments
  • Models, Theoretical*
  • Motion
  • Numerical Analysis, Computer-Assisted*
  • Radar*
  • Seawater*
  • Signal Processing, Computer-Assisted*
  • Sound Spectrography
  • Sound*
  • Time Factors