Conference proceeding
How parrots talk: insights based on CT scans, image processing, and mathematical models
Proceedings of SPIE - The International Society for Optical Engineering, Vol.3033, pp.14-24
Medical Imaging 1997: Physiology and Function from Multidimensional Images (Newport Beach, CA, USA, 02/23/1997 - 02/25/1997)
1997
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.
Details
- Title: Subtitle
- How parrots talk: insights based on CT scans, image processing, and mathematical models
- Creators
- Dianne PattersonIrene PepperbergBrad StoryEric Hoffman
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of SPIE - The International Society for Optical Engineering, Vol.3033, pp.14-24
- Conference
- Medical Imaging 1997: Physiology and Function from Multidimensional Images (Newport Beach, CA, USA, 02/23/1997 - 02/25/1997)
- Publisher
- PublisherSociety of Photo-Optical Instrumentation Engineers
- ISBN
- 9780819424440; 0819424447
- ISSN
- 0277-786X
- ISSN
- 0277-786X
- Language
- English
- Date published
- 1997
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Internal Medicine; Radiology
- Record Identifier
- 9984318802502771
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