Classification of vocalizations of killer whales using dynamic time warping

• Published in: The Journal of the Acoustical Society of America
• Main Authors: Brown, J C, Hodgins-Davis, A, Miller, P J O
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2006
• Subjects: ORCINUS-ORCA; Killer Whale; Orca; Orcinus orca; Killer whale
• Online Access: https://research-portal.st-andrews.ac.uk/en/researchoutput/classification-of-vocalizations-of-killer-whales-using-dynamic-time-warping(23c16186-adb5-4b52-bd1e-5c54c84f3a6c).html; https://doi.org/10.1121/1.2166949; http://www.scopus.com/inward/record.url?scp=33644660932&partnerID=8YFLogxK

A large number of killer whale sounds have recently been classified perceptually into Call Types. [A. Hodgins-Davis, thesis, Wellesley College (2004)]. The repetition rate of the pulsed component of five or more examples of each call type has been calculated using a modified form of the FFT based comb-filter method. A dissimilarity or distance matrix for these sounds was calculated using dynamic time warping to compare their melodic contours. These distances were transformed into a component space using multidimensional scaling and the resulting points were clustered with a kmeans algorithm. In grouping 57 sounds into 9 call types, a single discrepancy between the perceptual and the automated methods occurred. (c) 2006 Acoustical Society of America.