Biennial Conference on the Biology of Marine Mammals, Fall 1991
Title: A quantitative measure of similarity for Tursiops truncatus signature whistles
Author: John R. Buck

Bottlenose dolphins (tursiops truncatus) produce individually distinctive narrow-band "signature whistles." These whistles may be differentiated by the structure of their frequency contours. An algorithm is presented of extracting frequency contours from whistles and comparing two such contours. This algorithm performs nonuniform time dilation to align the contours and provides a quantitative distance measure between the contours. Two recognition experiments using the algorithm on three dolphin whistles from each of five individuals classified 15 out of 15 signal-loop whistles correctly, and 14 out of 15 central loops for multiple-loop whistles correctly.

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