Variability of phase and amplitude fronts due to horizontal refraction in shallow water

Boris G. Katsnelson, Valery A. Grigorev, James F. Lynch

Research output: Contribution to journalArticlepeer-review


The variability of the interference pattern of a narrow-band sound signal in a shallow water waveguide in the horizontal plane in the presence of horizontal stratification, in particular due to linear internal waves, is studied. It is shown that lines of constant phase (a phase front) and lines of constant amplitude/envelope (an amplitude front) for each waveguide mode may have different directions in the spatial vicinity of the point of reception. The angle between them depends on the waveguide's parameters, the mode number, and the sound frequency. Theoretical estimates and data processing methodology for obtaining these angles from experimental data recorded by a horizontal line array are proposed. The behavior of the angles, which are obtained for two episodes from the Shallow Water 2006 (SW06) experiment, show agreement with the theory presented.

Original languageEnglish
Pages (from-to)193-201
Number of pages9
JournalJournal of the Acoustical Society of America
Issue number1
StatePublished - 1 Jan 2018

Bibliographical note

Publisher Copyright:
© 2018 Acoustical Society of America.

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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