Forward Modeling And Data Inversion For Beam Propagation In A Stratified Medium. Ii: Numerical Results

L. Tai Lu, Chen Chen

Research output: Contribution to journalArticlepeer-review

Abstract

The general theory of both forward and inverse modelings for beam propagation in stratified media developed in Part I of this presentation [I-Tai Lu, J. Acoust. Soc. Am. 91, 1228-1238 (1992)] is examined in detail by numerical simulations. Modes, collective beams, and conventional beams have been employed to calculate the beam-excited wave phenomena in both piecewise-homogeneous and arbitrarily inhomogeneous layered media. These algorithms are formulated in the same framework and yield essentially the same results. Efficient data inversion procedures to minimize least-square errors for localizing a beam source are also presented and examined by numerical simulations. The conventional modal-filtering procedure using inner products of the received signals with the orthonormal eigenfunctions is proved to be a special case of a weighted least-square scheme.

Original languageEnglish (US)
Pages (from-to)1239-1249
Number of pages11
JournalJournal of the Acoustical Society of America
Volume91
Issue number3
DOIs
StatePublished - Mar 1992

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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