Effect of Internal Solitary Waves on Underwater Acoustic Propagation

Abstract

Internal solitary waves (ISWs) were observed on 07:52-09:36 GMT July 30 2005, in the Philippine Sea near Taiwan from high-resolution temperature sampling. The effect of ISWs on acoustic propagation was identified using the Navy's Comprehensive Acoustic Simulation System through comparison between range-independent and range-dependent sound speed profiles. The ISWs enhance the sound propagation slightly (0-3 dB) in near-range, weaken or enhance the sound propagation evidently in midrange, and always weaken the sound propagation in far range. The ISW's effect on the acoustic propagation varies with sound frequency and sound source depth. This work provides a methodology to anticipate possible errors in transmission loss estimation in an operational framework, if no further additional data are available.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2010
Accession Number
ADA533925

Entities

People

  • Chung-ping Hsieh
  • Peter Cheng Chu

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Signals
  • Acoustics
  • Attenuation
  • Frequency
  • Frequency Bands
  • Losses
  • Oceans
  • Philippine Sea
  • Sampling
  • Sea Water
  • Shallow Water
  • Simulations
  • Solitons
  • Sound Waves
  • Transmission Loss
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Atmospheric Science/Meteorology