DocumentCode :
1786674
Title :
Range and depth estimation of bowhead whale calls in the Arctic using a single hydrophone
Author :
Bonnel, Julien ; Thode, Aaron
Author_Institution :
Lab.-STICC, Univ. Eur. de Bretagne, Brest, France
fYear :
2014
fDate :
13-17 Oct. 2014
Firstpage :
1
Lastpage :
4
Abstract :
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.
Keywords :
acoustic signal processing; biocommunications; biological techniques; biology computing; hydrophones; zoology; Beaufort Sea; bowhead whale calls; classical Matched Mode Processing; depth estimation; dispersive waveguide; experimental bowhead whale vocalization; geacoustic inversion; low-frequency vocalizations; modal arrivals; mode filtering; nonlinear signal processing method; normal mode theory; propagated signal; range estimation; received signal; seabed properties; shallow-water Arctic environments; single hydrophone; sound propagation; source depth; source localization; source position; source range; synchronized hydrophone arrays; warping; Context; Dispersion; Estimation; Receivers; Sonar equipment; Spectrogram; Whales; bowhead whales; matched-mode processing; passive acoustic monitoring; source localization; warping;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sensor Systems for a Changing Ocean (SSCO), 2014 IEEE
Conference_Location :
Brest
Type :
conf
DOI :
10.1109/SSCO.2014.7000373
Filename :
7000373
Link To Document :
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