Measuring noise as a component of mammalian vocalizations is of interest because of its potential relevance to the communicative function. However, methods for characterizing and quantifying noise are less well established than methods applicable to harmonically structured aspects of signals. Using barks of coyotes and domestic dogs, we compared six acoustic measures and studied how they are related to human perception of noisiness. Measures of harmonic-to-noise-ratio (HNR), percent voicing, and shimmer were found to be the best predictors of perceptual rating by human listeners. Both acoustics and perception indicated that noisiness was similar across coyote and dog barks, but within each species there was significant variation among the individual vocalizers. The advantages and disadvantages of the various measures are discussed.
Characterizing noise in nonhuman vocalizations: Acoustic analysis and human perception of barks by coyotes and dogs
Present address and address correspondence to Tobias Riede, Indiana University, Medical Science Program, 315 Jordan Hall, Bloomington, Indiana 47405. Fax: +1 812 855 4436; electronic mail: [email protected]
Present address: University of Vermont, Rubenstein School of Environment and Natural Resources, 81 Carrigan Drive, Burlington, Vermont 05405-0088. Electronic mail: [email protected]
Present address: Department of Computer Science & Systems Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan. Electronic mail: [email protected]
Present address: Department of Psychology, Georgia State University, P.O. Box 5010, Atlanta, Georgia 30302-5010. Electronic mail: [email protected]
Tobias Riede, Brian R. Mitchell, Isao Tokuda, Michael J. Owren; Characterizing noise in nonhuman vocalizations: Acoustic analysis and human perception of barks by coyotes and dogs. J. Acoust. Soc. Am. 1 July 2005; 118 (1): 514–522. https://doi.org/10.1121/1.1928748
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