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Individual Variation in Vocal Tract Resonance May Assist Oilbirds in Recognizing Echoes of Their Own Sonar Clicks

  • Roderick A. Suthers
  • Dwight H. Hector
Part of the NATO ASI Science book series (NSSA, volume 156)

Abstract

Oilbirds, Steatornis caripensis, live in colonies in caves, within which they navigate by echolocation (Griffin 1953, Snow 1961). The sonar “clicks” of these nocturnal birds typically last about 40 to 80 ms and are emitted at repetition rates up to about 12/s. Most of the acoustic energy lies beween 1 and 15 kHz. Sound during some clicks is continuous but other clicks, here referred to as double clicks, are divided by a silent period lasting about 20–30 ms into two brief bursts of sound.

Keywords

Formant Frequency Vocal Tract Silent Period Fundamental Resonance Bilateral Asymmetry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Griffin, D. R. 1953. Acoustic orientation in the oilbird, Steatornis. Proc. Natl. Acad. Sci. U.S.A. 39: 884.PubMedCrossRefGoogle Scholar
  2. Roederer, J. G. 1974. “Introduction to the Physics and Psychophysics of Music.” Springer Verlag, New York.Google Scholar
  3. Snow, D. W. 1961. The natural history of the oilbird, Steatornis caripensis, in Trinidad W. I. I. General behavior and breeding habits. Zoologica 46: 27.Google Scholar
  4. Suthers, R. A. 1986. Avian vocal tract resonance: Structural variation produces individually unique vocalizations in oilbirds. Submitted for publication.Google Scholar
  5. Suthers, R. A. and Hector, D. H. 1985. The physiology of vocalization by the echolocating oilbird, Steatornis caripensis. J. Comp. Physiol. A 156: 243.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Roderick A. Suthers
    • 1
  • Dwight H. Hector
    • 1
  1. 1.School of Medicine and Department of BiologyIndiana UniversityBloomingtonUSA

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