Range and depth estimation of bowhead whale calls in the Arctic using a single hydrophone

• Published in: 2014 IEEE Sensor Systems for a Changing Ocean (SSCO).
• Main Authors: Bonnel, Julien, Thode, Aaron
• Other Authors: Lab-STICC_ENSTAB_CID_TOMS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS), Scripps Institution of Oceanography (SIO), University of California San Diego (UC San Diego), University of California-University of California
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2014
• Subjects: warping; source localization; passive acoustic monitoring; matched-mode processing; bowhead whales; [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]; [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing; Arctic; Beaufort Sea; bowhead whale
• Online Access: https://hal.archives-ouvertes.fr/hal-01139986; https://doi.org/10.1109/SSCO.2014.7000373

International audience Bowhead whales generate low-frequency vocalizations in shallow-water Arctic environments. The propagation of these sounds is adequately described by normal mode theory. Indeed, at low-frequency the environment acts as a dispersive waveguide. The propagated signal can be modeled by a sum of normal modes, and the source position can be inferred from the different modal arrivals. However, this requires to estimate the modes from the received signal. Traditionally, modal arrivals are separated using synchronized hydrophone arrays. Here a nonlinear signal processing method called warping is used to filter the modes on just a single hydrophone. Once modes are filtered, the source depth and range can be estimated using classical Matched Mode Processing. This methodology is illustrated on an experimental bowhead whale vocalization recorded in the Beaufort Sea. Because seabed properties are not well known, it is necessary to jointly perform source localization and geacoustic inversion.