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Tabu for matched-field source localization and geoacoustic inversion.

Zoi-Heleni Michalopoulou1, Urmi Ghosh-Dastidar

  • 1Department of Mathematical Sciences, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.

The Journal of the Acoustical Society of America
|February 5, 2004
PubMed
Summary

A new Tabu-based method improves underwater source localization and geoacoustic inversion accuracy and efficiency compared to simulated annealing. This global optimization technique uses memory for multiparameter search guidance.

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Area of Science:

  • Ocean acoustics
  • Geophysics
  • Computational optimization

Background:

  • Global optimization techniques are crucial for complex inverse problems.
  • Tabu search is a powerful heuristic optimization method with applications in operations research.
  • Accurate source localization and geoacoustic inversion are vital for underwater acoustics.

Purpose of the Study:

  • To develop and evaluate a Tabu-based method for source localization and geoacoustic inversion using underwater sound data.
  • To compare the performance of the Tabu-based method against simulated annealing for multiparameter inversion.
  • To demonstrate the method's effectiveness on both synthetic and real-world oceanographic data.

Main Methods:

  • A Tabu search algorithm was implemented to guide the multiparameter search for source localization and geoacoustic inversion.

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  • The Tabu-based method was tested using synthetic underwater acoustic data with varying numbers of unknown parameters.
  • Performance was benchmarked against a simulated annealing algorithm using the same synthetic datasets.

    • Main Results:

    • The Tabu-based method demonstrated superior accuracy and efficiency in inverting synthetic data compared to the implemented simulated annealing variant.
    • The method successfully performed geoacoustic inversion on the real-world SWellEX-96 data set.
    • The memory-guided search of the Tabu method proved effective for multiparameter inversion problems.

    Conclusions:

    • Tabu search offers a more accurate and efficient approach for source localization and geoacoustic inversion than simulated annealing.
    • The developed Tabu-based method is a viable tool for analyzing underwater acoustic data and solving complex geophysical inverse problems.
    • Further applications of Tabu search in underwater acoustics and related fields are warranted.