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Source depth discrimination with a vertical line array.

Ewen Conan¹, Julien Bonnel¹, Thierry Chonavel²

¹Laboratoire des Sciences et Techniques de l'Information, de la Communication et de la Connaissance, Unité Mixte de Recherche, Centre National de la Recherche Scientifique 6285, École Nationale Supérieure de Techniques Avancées, Bretagne, 2 rue François Verny, 29806 Brest Cedex 9, France ewen.conan@ensta-bretagne.org, julien.bonnel@ensta-bretagne.fr.

The Journal of the Acoustical Society of America

|December 3, 2016

Summary

This summary is machine-generated.

This study simplifies source depth estimation by treating it as a binary classification problem. It distinguishes between surface and submerged sources using normal modes, enhancing robustness in underwater acoustics.

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Area of Science:

Underwater acoustics
Signal processing
Oceanography

Background:

Traditional source depth estimation uses mode filtering and matched-mode processing.
Mode filtering can be ill-posed with undersampled water columns, impacting robustness.

Purpose of the Study:

To develop a more robust method for source depth estimation.
To discriminate between surface and submerged acoustic sources using a binary classification approach.

Main Methods:

Formulating source depth hypotheses in terms of normal modes (trapped and free modes).
Proposing decision metrics based on established mode filters.
Employing Monte Carlo simulations for performance prediction and classifier parameter tuning.

Main Results:

A simplified binary classification approach for source depth discrimination.
Demonstration of a robust method less sensitive to water column sampling issues.
Validation of decision metrics and classifier performance through simulation.

Conclusions:

The binary classification approach offers a robust alternative to traditional methods for source depth estimation.
Utilizing normal modes and Monte Carlo simulations effectively addresses challenges in underwater acoustic signal processing.
This method enhances the reliability of identifying source locations relative to the ocean surface.