Application of a Modified Time Delay Spectrometry Technique in Modeling of Underwater Acoustic Propagation.

Abstract

The analysis of sound propagating by multiple paths in an ocean at short ranges has been conducted using a Modified Time Delay Spectrometry (TDS) technique. In this version of TDS, a source driven by a linear FM slide and an HP3561A Dynamic Signal Analyzer are used to measure the amplitude as a function of frequency of signals traveling by different paths and having different arrival times. Two sets of data from the acoustic test ranges at the Naval Undersea Weapons Engineering Station were analyzed for different environment conditions to determine the relative amplitudes of the directly propagating and surface reflected signals. Comparisons with simple rough surface scattering theory showed reasonable agreement. Results and control software are presented and discussed. Recommendations for future applications are made. Keywords: Multipath acoustic propagation; Time delay spectrometry; Surface reflection; Theses.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADA182188

Entities

People

  • Louis L. Prudhomme

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustic Measurement
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Signals
  • Acoustic Waves
  • Acoustics
  • Amplitude
  • Analyzers
  • Computer Programs
  • Data Analysis
  • Engineering
  • Frequency
  • Recording Systems
  • Scattering
  • Sound Pressure
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Electronics Engineering
  • Wave Propagation and Nonlinear Chaotic Dynamics.