Development of a Modified Time Delay Spectrometry Technique for Underwater Acoustic Measurements in a Multipath Environment.

Abstract

A measurement technique has been developed which makes possible the determination of the acoustic transmission loss for various paths between a source and a receiver at relatively short ranges in the ocean. The method is based upon a technique called Time Delay Spectrometry (TDS). The theory for utilizing TDS to perform measurements on an underwater test range with a homogeneous water column is presented. The experimental parameters concerning test geometry together with criteria for the source signal are discussed and the limitations are described. A computer program written in HP BASIC is the tool in a multipath measurement system where analog sound signals recorded on tape are processed by an HP 356A Dynamic Signal Analyzer under program control. Originator-supplied keywords include: Time Delay Spectrometry (TDS), Under water acoustic propagation, Dynamic signal analyzer, Linear frequency modified pulse (LFM pulse).

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1984
Accession Number
ADA152111

Entities

People

  • B. Brekke

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustic Signals
  • Acoustics
  • Analyzers
  • Basic Programming Language
  • Computer Programs
  • Computers
  • Engineering
  • Geometry
  • Measurement
  • Recording Systems
  • Schools
  • Spectrum Analyzers
  • Three Dimensional
  • Time Intervals
  • Transmission Loss
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Radar Systems Engineering.
  • Wave Propagation and Nonlinear Chaotic Dynamics.