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Abstract and Summary

Lagging behind the methodological standard reached in human speech analysis, spectrograms from animal vocalisations must still be analysed at least partly “by hand”. The method described here uses minicomputer feature detection techniques to extract frequency modulation and amplitude modulation contours and the number of harmonics automatically from cotton-top tamarin vocalisations. This system thus offers a very workable tool for the detailed analysis of animal vocalisations, as demonstrated in an application where the stereotypy of an amplitude modulation pattern of cotton-top tamarin calls is shown.