Numerical modeling of acoustic tomography in the Straits of Florida: Sensitivity to bathymetry

Lan Nghiem-Phu, Harry A. DeFerrari

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

An acoustic model based on the split-step parabolic equation technique is used to study the effects of irregularities in bathymetry on the transmission loss or equivalently, sound energy distribution for continuous wave (cw) acoustic signals. In particular, contours of transmission loss in the range-depth plane are predicted for the propagation of a 510-Hz cw signal across the Straits of Florida between Miami, Florida and Bimini, Bahamas. The predicted intensity contours exhibit recognizable energy bundles that correspond to actual ray bundles. The stability of these bundles is studied as random bottom irregularities are introduced. The distribution of acoustic energy is found to be insensitive to random variations in bottom bathymetry of up to 5 m rms. The same model is used to investigate the feasibility of transport and depth-averaged temperature measurements of the Florida current by acoustic method. Energy contour plots are predicted for several source-receiver geometries. A system of five transceivers positioned to form two triangles sharing a common vertex in the eastern edge of the Miami terrace is evaluated as a monitoring strategy.

Original languageEnglish (US)
Pages (from-to)1385-1398
Number of pages14
JournalJournal of the Acoustical Society of America
Volume81
Issue number5
DOIs
StatePublished - May 1987

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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