Localisation of right whale sounds in the workshop bay of fundy dataset by spectrogram cross-correlation and hyperbolic fixing

Auteurs-es

  • Marjo H. Laurinolli Department of Fisheries, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, NS B2Y 4A2
  • Alex E. Hay Department of Oceanography, Dalhousie University, Halifax, NS B3H 4J1

Mots-clés :

Acoustic waves, Correlation methods, Error analysis, Hydrophones, Oceanography, Spectrum analysis, Datasets, Gunshot sounds, Hyperbolic fixing, Whale sounds

Résumé

En septembre 2002, cinq hydrophones ancrés au fond marin dans la Baie de Fundy ont enregistré des données acoustiques échantillonnées à 1200 Hz pour une durée de 165.6 h. Des différences de temps d’arrivée pour 15 sons de baleines franches (5 « coups de feu », 10 tonals) ont été déterminés par corrélation croisée de spectrogrammes de densité spectrale logarithmique (i.e. dB re 1 |iPa2/Hz). La localisation des sources sonores a été estimée à partir des intersections d’hyperboles linéairement indépendantes de différences temporelles égales pour différentes paires d’hydrophone s. La moyenne quadratique (RMS) de l’erreur de localisation a été examinée en utilisant trois vitesses de son. L’erreur RMS moyenne la plus basse (0.85 km) a été obtenue avec 1485 m/s, soit 7 m/s de moins que la mesure moyenne de la vitesse du son. Les vocalisations avaient une plus grande erreur de localisation que les sons « coup de feu», soit 0.4 km de plus. Les distances moyennes et maximales à partir de l’hydrophone central du réseau étaient de 10 et 30 km respectivement.

Fichiers supplémentaires

Publié-e

2004-06-01

Comment citer

1.
Laurinolli MH, Hay AE. Localisation of right whale sounds in the workshop bay of fundy dataset by spectrogram cross-correlation and hyperbolic fixing. Canadian Acoustics [Internet]. 1 juin 2004 [cité 15 mai 2026];32(2):132-6. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1596

Numéro

Vol. 32 No. 2 (2004)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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