Rays, modes, wavefield structure, and wavefield stability

Michael G. Brown, Francisco J. Beron-Vera, Irina Rypina, Ilya A. Udovydchenkov

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Sound propagation is considered in range-independent environments and environments consisting of a range-independent background on which a weak range-dependent perturbation is superimposed. Recent work on propagation in both types of environments, involving both ray- and mode-based wavefield descriptions, have focused on the importance of α, a ray-based "stability parameter," and β, a mode-based "waveguide invariant." It is shown that, when β is evaluated using asymptotic mode theory, β= α. Using both ray and mode concepts, known results relating to the manner by which α (or β) controls both the unperturbed wavefield structure and the stability of the perturbed wavefield are briefly reviewed.

Original languageEnglish (US)
Pages (from-to)1607-1610
Number of pages4
JournalJournal of the Acoustical Society of America
Issue number3 II
StatePublished - Mar 2005

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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