Underwater communication using weakly dispersive modal pulses

Michael G. Brown, Ilya A. Udovydchenkov

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

In the modal description of sound propagation, signal distortion is caused primarily by dispersion, which is largely controlled by the product I(m; f)β(m; f). Here m is mode number, f is acoustic frequency, I is the action and β is the waveguide invariant. A modal pulse with fixed m and variable f that satisfies Iβ ≈ 0 over the entire frequency band is referred to in this letter as a weakly dispersive modal pulse. The manner by which weakly dispersive modal pulses can be exploited in underwater communications applications is described and illustrated. The connection between weakly dispersive modal pulses and weakly divergent beams is discussed.

Original languageEnglish (US)
Pages (from-to)533-538
Number of pages6
JournalAcoustical Physics
Volume59
Issue number5
DOIs
StatePublished - Sep 1 2013

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Keywords

  • modal description of sound propagation
  • underwater communication

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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