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Automatic detection and classification of odontocete whistles
Gillespie, D.; Caillat, M.; Gordon, J. (2013). Automatic detection and classification of odontocete whistles. J. Acoust. Soc. Am. 134(3): 2427-2437. hdl.handle.net/10.1121/1.4816555
In: The Journal of the Acoustical Society of America. American Institute of Physics: New York, etc. ISSN 0001-4966, more
Peer reviewed article  

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Keyword
    Marine
Author keywords
    acoustic signal detection, acoustic signal processing, bioacoustics, biocommunications, signal classification, signal denoising, underwater sound

Authors  Top 
  • Gillespie, D.
  • Caillat, M.
  • Gordon, J.

Abstract
    Methods for the fully automatic detection and species classification of odontocete whistles are described. The detector applies a number of noise cancellation techniques to a spectrogram of sound data and then searches for connected regions of data which rise above a pre-determined threshold. When tested on a dataset of recordings which had been carefully annotated by a human operator, the detector was able to detect (recall) 79.6% of human identified sounds that had a signal-to-noise ratio above 10?dB, with 88% of the detections being valid. A significant problem with automatic detectors is that they tend to partially detect whistles or break whistles into several parts. A classifier has been developed specifically to work with fragmented whistle detections. By accumulating statistics over many whistle fragments, correct classification rates of over 94% have been achieved for four species. The success rate is, however, heavily dependent on the number of species included in the classifier mix, with the mean correct classification rate dropping to 58.5% when 12 species were included.

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