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Journal of the Acoustical Society of America / Volume 108 / Issue 4 / VOCALIZATION IN ANIMALS AND HUMANS: PAPERS FROM A 1999 SYMPOSIUM IN BERLIN

Nonlinear phenomena in the natural howling of a dog–wolf mix

J. Acoust. Soc. Am. Volume 108, Issue 4, pp. 1435-1442 (2000); (8 pages)

Tobias Riede1, Hanspeter Herzel2, Doreen Mehwald1, Wolfram Seidner3, Erika Trumler4, Gerhard Böhme5, and Günter Tembrock1

1Institut für Biologie, Humboldt-Universität zu Berlin, Invalidenstrasse 43, 10115 Berlin, Germany
2Innovationskolleg für Theoretische Biologie, Humboldt-Universität zu Berlin, Invalidenstrasse 43, 10115 Berlin, Germany
3Universitätsklinikum Charité, Abt. Phoniatrie, Pädaudiologie, Humboldt-Universität zu Berlin, Schumannstrasse 20/21, 10098 Berlin, Germany
4Eberhard-Trumler-Station, Wolfswinkel 1, 57587 Birken-Honigsessen, Germany
5Institut für Veterinär-Anatomie, Freie Universität Berlin, Koserstrasse 20, 14195 Berlin, Germany

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It was reported to the first author that a female dog–wolf mix showed anomalously rough-sounding vocalization. Spectral analysis of recordings of the vocalization revealed frequency occurrences of subharmonics, biphonation (two independent pitches) and chaos. Since these nonlinear phenomena are currently widely discussed as integral to mammalian vocalization [Wilden et al., Bioacoustics 9, 171–196 (1988)] or as indicators of vocal pathologies [Herzel et al., J. Speech Hearing Res. 37, 1008–1019 (1994); Riede et al., Z. Sgtkde 62 Suppl: 198–203 (1997)], we sought to understand the production mechanism of the observed vocal instabilities. First the frequency of nonlinear phenomena in the calls was determined for the female and four additional individuals. It turned out that these phenomena appear, but much less frequently in the repertoire of the four other animals. The larynges of the female and two other individuals were dissected post mortem. There was no apparent asymmetry of the vocal folds but a slight asymmetry of the arytenoid cartilages. The most pronounced difference, however, was an upward extension of both vocal folds of the female. This feature is reminiscent of “vocal lips” (syn. “vocal membranes”) in some primates and bats. Spectral analysis of the female’s voice showed clear similarities with an intensively studied voice of a human who produces biphonation intentionally. Finally, the possible communicative relevance of nonlinear phenomena is discussed. © 2000 Acoustical Society of America.

© 2000 Acoustical Society of America

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KEYWORDS and PACS

Keywords

biocommunications, chaos, nonlinear dynamical systems

PACS

  • 43.80.Lb

    Sound reception by animals: anatomy, physiology, auditory capacities, processing

  • 43.80.Ka

    Sound production by animals: mechanisms, characteristics, populations, biosonar

ARTICLE DATA

History
Received 01 Jul 1999
Accepted 13 Jun 2000
Digital Object Identifier
http://dx.doi.org/10.1121/1.1289208

PUBLICATION DATA

ISSN

0001-4966 (print)  

Publisher

$abstract.society.value is a Member of CrossRef Acoustical Society of America

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