Source depth discrimination: An evaluation and comparison of several classifiers

Ewen Conan 1, 2 Julien Bonnel 1, 2 Thierry Chonavel 3, 4 Barbara Nicolas 5
1 Pôle STIC_AP
ENSTA Bretagne
2 Lab-STICC_ENSTAB_CID_TOMS
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
3 Lab-STICC_TB_CID_TOMS
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
5 Imagerie Ultrasonore
CREATIS - Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé
Abstract : Source depth estimation with a vertical linear array generally involves mode filtering, followed by matched-mode processing. However, this method has two main limitations: the problem of mode filtering is ill-posed in the case of partially spanning arrays; matched-mode processing is sensitive to environmental mismatch. Therefore, concerns for robustness motivate a simpler approach. The problem of depth estimation is reduced to a binary classification problem: source depth discrimination. Its aim is to evaluate whether the source is near the surface or submerged. These two hypotheses are formulated in terms of normal modes, using the concept of trapped and free modes. Several classification rules, based on modal filtering or on subspace projections, are studied. Monte-Carlo methods are used to evaluate their performance and compute receiver operating characteristics. This allows the choice of a discrimination threshold according to some expected performance. The benefits of considering a source depth discrimination problem rather than a source localization one are highlighted. The influence of noise and environmental mismatch are investigated, as well as the choice of the discrimination depth and the choice of the limit between trapped and free modes.
Type de document :
Communication dans un congrès
ASA Fall 2015 : 170th Meeting of the Acoustical Society of America , Nov 2015, Jacksonville, United States. Proceedings ASA Fall 2015 : 170th Meeting of the Acoustical Society of America 4pUw2 - 2015, 〈10.1121/1.4934068〉
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https://hal.archives-ouvertes.fr/hal-01611535
Contributeur : Bibliothèque Télécom Bretagne <>
Soumis le : vendredi 6 octobre 2017 - 09:31:47
Dernière modification le : vendredi 7 décembre 2018 - 01:51:23

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Ewen Conan, Julien Bonnel, Thierry Chonavel, Barbara Nicolas. Source depth discrimination: An evaluation and comparison of several classifiers. ASA Fall 2015 : 170th Meeting of the Acoustical Society of America , Nov 2015, Jacksonville, United States. Proceedings ASA Fall 2015 : 170th Meeting of the Acoustical Society of America 4pUw2 - 2015, 〈10.1121/1.4934068〉. 〈hal-01611535〉

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