Acoustic Propagation Loss Modeling for Dabob Bay, Washington

Abstract

An analysis of the acoustic sound propagation in a multipath environment in an ocean at short ranges has been conducted using a Modified Time Delay Spectrometry (TDS) and an experimental continuous-wave technique. Data from the acoustic range at Dabob Bay, WA were analyzed to determine the relative amplitudes of the direct- and surface-reflected signals. The results show that, at moderate ranges and typical source and receiver depths, the surface-reflected sound is a significant contributor to the received sound level. The theory supporting both techniques is presented. Discussions and conclusions are drawn. Recommendations for future investigation are made.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1991
Accession Number
ADA245278

Entities

People

  • John R. Mitchell

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Amplitude
  • Analyzers
  • Computers
  • Continuous Waves
  • Data Analysis
  • Data Processing
  • Engineering
  • Environment
  • Excitation
  • Frequency
  • Geometry
  • Measurement
  • Recording Systems

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Theoretical Analysis.