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This study introduces a hybrid acoustic propagation model to estimate source range in complex 3D environments. The method achieved a low average error of 3.7% for underwater acoustic source localization.

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Area of Science:

  • Ocean acoustics
  • Underwater acoustics
  • Signal processing

Background:

  • Accurate source range estimation is crucial for underwater acoustic applications.
  • Traditional methods often struggle with complex three-dimensional (3D) propagation effects.
  • Environmental variability poses challenges for acoustic modeling.

Purpose of the Study:

  • To present a novel method for estimating acoustic source range in environments with 3D propagation.
  • To develop a computationally efficient technique requiring minimal environmental data.
  • To validate the method using real-world acoustic data.

Main Methods:

  • A hybrid modeling technique combining vertical modes and horizontal rays was employed.
  • The method was applied to acoustic data recorded by a horizontal line array.
  • Source range estimation was performed in a 3D acoustic propagation scenario.

Main Results:

  • The hybrid method demonstrated accurate source range estimation.
  • An average error of 3.7% was achieved in range estimation.
  • The technique proved effective for sources located between 20 and 63 km.

Conclusions:

  • The hybrid modeling approach is effective for 3D acoustic propagation.
  • The method offers a computationally efficient solution for source range estimation.
  • This technique has practical implications for underwater acoustic surveillance and navigation.