Robust 2D localization of low-frequency calls in shallow waters using modal propagation modelling

Auteurs-es

  • C. Gervaise E3I2, EA3876, GIS Europôle Mer, 2 Rue François Verny, 29200 Brest, France
  • S. Vallez E3I2, EA3876, GIS Europôle Mer, 2 Rue François Verny, 29200 Brest, France
  • Y. Stephan CMO/SHOM, 13 Rue Chatellier, 29200, Brest, France
  • Y. Simard Institut des Sciences de la Mer, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, QC G5L 3A1, Canada

Mots-clés :

Acoustics, Electroacoustic transducers, Mammals, Two dimensional, Low frequencies, Modal propagation, Shallow waters

Résumé

Dans ce papier, un algorithme robuste de localisation 2D à partir des émissions transitoires dans des milieux petits fonds est proposé. Il s’appuie sur un modèle de propagation modale. Une analyse des phénomènes de dispersion induits par la propagation montre qu’il est possible, à partir d’un réseau lâche d’hydrophones, de proposer une méthode de localisation ne nécessitant ni la connaissance du milieu, ni l’exécution d’un code de propagation. L’algorithme de localization ne nécessite pas la synchronization du réseau et est par conséquent indépendant des dérives d’horloges. Des résultats encourageants sont obtenus pour localiser les émissions « gunshot » des baleines franches à partir du jeu de données de la Baie de Fundy, de ‘l’Atelier de 2003 sur la détection, la localisation et la classification de mammifères marins par acoustique passive’.

Fichiers supplémentaires

Publié-e

2008-03-01

Comment citer

1.
Gervaise C, Vallez S, Stephan Y, Simard Y. Robust 2D localization of low-frequency calls in shallow waters using modal propagation modelling. Canadian Acoustics [Internet]. 1 mars 2008 [cité 21 févr. 2025];36(1):153-9. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2005

Numéro

Vol. 36 No. 1 (2008)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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