Preliminary Investigation of the Environmental Sensitivity of Acoustic Signal Transmission in the Wavenumber Domain with Respect to Source Depth Determination.

Abstract

The Wavenumber Technique (WT) is a relatively new method of underwater sound transmission analysis. One aspect, source depth determination, is studied to evaluate its validity and test environmental and acoustic sensitivity. The horizontal wavenumber spectrum is analyzed to determine null spacings in wavenumber space, which indicates source depth by the Lloyd's Mirror interference effect. Comparison of this theory with cases of an isospeed sound profile, fully absorbing bottom, and flat totally-reflecting surface shows excellent agreement for several parametric variations. Cases with realistic sound speed profiles and partially absorbing bottoms generally agree with theory, but a distinct bias is observed. Source depth determination curves, which relate scaled wavenumber spectral intensity null spacing to the source depth, are presented for comparison with theory and sensitivity analysis. An example is given for suggested application of source depth determination. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA126688

Entities

People

  • Billy Barton Stamey Jr

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Signals
  • Acoustic Waves
  • Acoustics
  • Complex Adaptive Systems
  • Computations
  • Computer Programs
  • Differential Equations
  • Geometry
  • Losses
  • Partial Differential Equations
  • Physical Properties
  • Refractive Index
  • Seabed
  • Underwater Acoustics
  • Underwater Sound
  • Wave Equations

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Regression Analysis.
  • Spectroscopy.

Technology Areas

  • Space