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

作     者：Riede, T Herzel, H Mehwald, D Seidner, W Trumler, E Böhme, G Tembrock, G 

作者机构：Humboldt Univ Inst Biol D-10115 Berlin Germany Humboldt Univ Innovat Skolleg Theoret Biol D-10115 Berlin Germany Humboldt Univ Klinikum Charite Abt Phoniatrie D-10098 Berlin Germany Eberhard Trumler Stn D-57587 Birken Honigsessen Germany Free Univ Berlin Inst Vet Anat D-14195 Berlin Germany 

出 版 物：《JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA》 (美国声学会志)

年 卷 期：2000年第108卷第4期

页      面：1435-1442页

核心收录：

学科分类：1002[医学-临床医学] 07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

主　　题：狗/生理学 傅里叶分析 杂交 遗传 声波谱图术 种特异性 声带/生理学 发声 动物/生理学 狼/生理学 动物 女(雌)性 人类 男(雄)性 

摘      要：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 ct al., J. Speech Hearing Res. 37, 1008-1019 (1994);Riede ct 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. (C) 2000 Acoustical Society of America. [S0001-4966(00)00510-5].