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Feilong Zhu1, Fenghua Li1, Yanjun Zhang1

  • 1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, Chinazhufl@mail.ioa.ac.cn, lfh@mail.ioa.ac.cn, zhangyanjun@mail.ioa.ac.cn, zhangbo@mail.ioa.ac.cn, liwen@mail.ioa.ac.cn, talentwtc@163.com.

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This summary is machine-generated.

This study improves a Fourier integral method for estimating submerged target depth using horizontal line arrays. The method leverages interference patterns between direct and surface-reflected sound paths, validated in deep ocean experiments.

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Area of Science:

  • Acoustics
  • Oceanography
  • Signal Processing

Background:

  • Received sound intensity from line arrays is affected by source movement and interference.
  • Interference between direct and surface-reflected paths modulates with target depth.

Purpose of the Study:

  • To improve the Fourier integral method for underwater target depth estimation using a horizontal line array.
  • To compare the improved Fourier integral method with the matched sound intensity structure method.

Main Methods:

  • Improved Fourier integral method (based on McCargar and Zurk, 2013).
  • Matched sound intensity structure method (Zheng et al., 2020) for comparison.
  • Verification through a deep ocean experiment.

Main Results:

  • The improved Fourier integral method demonstrates effectiveness for depth estimation.
  • Comparison validates the performance of the enhanced Fourier integral method.

Conclusions:

  • The enhanced Fourier integral method is a viable technique for underwater target depth estimation.
  • Interference pattern analysis is crucial for accurate depth localization in ocean acoustics.