How parrots talk: insights based on CT scans, image processing, and mathematical models

Dianne K. Patterson, Irene M. Pepperberg, Brad H Story, Eric A. Hoffman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Little is known about mechanisms of speech production in parrots. Recently, however, techniques for correlating vocal tract shape with vowel production in humans have become more sophisticated and we have adapted these techniques for use with parrots. We scanned two grey parrot heads with intact vocal tracts. One specimen, 'Oldbird' was fixed with its beak propped open; the second 'Youngbird' was fixed with its beak closed. Using VIDA software, we (1) established that differences in tongue and larynx positioning resulted from opening or closing the beak; and (2) obtained lengths and area functions for the trachea, glottis, pharynx, mouth, and choana for both specimens and esophageal length and area functions for the first specimen. We entered lengths and area functions into a 1D wave propagation model to determine the natural formant frequencies associated with an open versus closed beak. We also determined how manipulating lengths and area functions could affect formant frequency and relative intensity. Finally, by comparing observed grey parrot vowel formant, we predict how the parrot uses its vocal tract to produce speech.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages14-24
Number of pages11
Volume3033
ISBN (Print)0819424447
StatePublished - 1997
EventMedical Imaging 1997: Physiology and Function from Multidimensional Images - Newport Beach, CA, USA
Duration: Feb 23 1997Feb 25 1997

Other

OtherMedical Imaging 1997: Physiology and Function from Multidimensional Images
CityNewport Beach, CA, USA
Period2/23/972/25/97

Fingerprint

Computerized tomography
image processing
mathematical models
Image processing
Mathematical models
vowels
pharynx
glottis
trachea
larynx
tongue
mouth
closing
Wave propagation
positioning
resonant frequencies
wave propagation
Natural frequencies
computer programs

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Patterson, D. K., Pepperberg, I. M., Story, B. H., & Hoffman, E. A. (1997). How parrots talk: insights based on CT scans, image processing, and mathematical models. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3033, pp. 14-24). Society of Photo-Optical Instrumentation Engineers.

How parrots talk : insights based on CT scans, image processing, and mathematical models. / Patterson, Dianne K.; Pepperberg, Irene M.; Story, Brad H; Hoffman, Eric A.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3033 Society of Photo-Optical Instrumentation Engineers, 1997. p. 14-24.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Patterson, DK, Pepperberg, IM, Story, BH & Hoffman, EA 1997, How parrots talk: insights based on CT scans, image processing, and mathematical models. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3033, Society of Photo-Optical Instrumentation Engineers, pp. 14-24, Medical Imaging 1997: Physiology and Function from Multidimensional Images, Newport Beach, CA, USA, 2/23/97.
Patterson DK, Pepperberg IM, Story BH, Hoffman EA. How parrots talk: insights based on CT scans, image processing, and mathematical models. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3033. Society of Photo-Optical Instrumentation Engineers. 1997. p. 14-24
Patterson, Dianne K. ; Pepperberg, Irene M. ; Story, Brad H ; Hoffman, Eric A. / How parrots talk : insights based on CT scans, image processing, and mathematical models. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3033 Society of Photo-Optical Instrumentation Engineers, 1997. pp. 14-24
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