Broadband, Range-Dependent Normal Mode Model Development

Abstract

Practical approaches to modeling broadband acoustic propagation in range-dependent environments using normal mode theory were developed. A method for eliminating the branch line integral from the normal mode solution was developed, analyzed, and documented in a JASA article. The accuracy and characteristics of various adiabatic- and coupled-mode approaches for range-dependent benchmark problems were investigated. A method for extracting the acoustic modes of propagation and inverting for the acoustic parameters of the ocean and ocean bottom using data measured on a vertical line array was investigated. The results of the investigation were documented in a Ph.D. dissertation and in a JASA article.

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Document Details

Document Type
Technical Report
Publication Date
Jul 09, 2002
Accession Number
ADA404172

Entities

People

  • Evan K. Westwood

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Acoustic Waveguides
  • Acoustics
  • Active Sonar
  • Algorithms
  • Ambient Noise
  • Attenuation
  • Broadband
  • Eigenvalues
  • Environment
  • Frequency
  • Frequency Bands
  • Integrals
  • Physics
  • Seabed
  • Underwater Acoustics

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Calculus or Mathematical Analysis
  • Technical Research and Report Writing.