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Related Experiment Videos

Long range source localization from single hydrophone spectrograms.

W A Kuperman1, G L D'Spain, K D Heaney

  • 1Scripps Institutions of Oceanography, University of California, San Diego, La Jolla 92093-0701, USA.

The Journal of the Acoustical Society of America
|June 2, 2001
PubMed
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Estimating underwater source range is possible using sound dispersion patterns. A focal region in spectrograms, derived from sound propagation, aids in precise source localization.

Area of Science:

  • Ocean acoustics
  • Underwater sound propagation
  • Signal processing

Background:

  • Sound propagation in the deep sound channel involves complex interactions.
  • Dispersion analysis of broadband signals offers potential for range estimation.
  • Modal group speed transitions can create unique arrival structures.

Purpose of the Study:

  • To investigate the use of sound dispersion and focal regions for underwater source localization.
  • To analyze the transition of modal group speeds in different acoustic environments.
  • To validate localization methods using real-world data from the Acoustic Thermometry of the Ocean Climate program.

Main Methods:

  • Analysis of broadband acoustic signals recorded on a single hydrophone.
  • Examination of dispersion properties of sound propagation.

Related Experiment Videos

  • Identification and analysis of focal regions in spectrograms.
  • Comparison of results with established acoustic localization theories.

    • Main Results:

    • Broadband sound dispersion on a single hydrophone can estimate source range.
    • Modal group speed transitions create focal regions in spectrograms, aiding localization.
    • Acoustic Thermometry of the Ocean Climate data confirms localization using focal regions and dispersion.

    Conclusions:

    • Underwater source localization can be effectively achieved using sound dispersion analysis.
    • Focal regions in spectrograms provide a robust feature for precise source positioning.
    • The findings support and extend historical methods for acoustic source localization.