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Adaptive auditory-motor control of the time-varying formant trajectories in vowels and its patterns of generalization

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dc.contributor.advisor Joseph S. Perkell. en_US
dc.contributor.author Cai, Shanqing en_US
dc.contributor.other Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. en_US
dc.date.accessioned 2012-05-15T21:12:37Z
dc.date.available 2012-05-15T21:12:37Z
dc.date.copyright 2012 en_US
dc.date.issued 2012 en_US
dc.identifier.uri http://hdl.handle.net/1721.1/70789
dc.description Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012. en_US
dc.description Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references (p. 61-65). en_US
dc.description.abstract This thesis aims at elucidating the role of auditory feedback in the learning and planning of complex articulatory gestures in time-varying phonemes. To this end, we studied native Mandarin speakers' responses to perturbations of their auditory feedback of the first and second formant trajectories during the production of the Mandarin triphthong /iau/. On the group level, subjects adaptively adjusted their productions to partially compensate for the perturbations in auditory feedback under both the F1 and F2 perturbations. But considerable between-individual variation existed. The result indicate that auditory feedback-based learning and control of speech movements is not restricted to quasi-static gestures in monophthongs as found in previous studies, but also extends to time-varying gestures. To probe the internal structure of the mechanisms of auditory-motor transformations in speech, we tested the pattern of generalization of the adaptation trained on the triphthong /iau/ to other vowels with different spatial and temporal characteristics in the same language. A broad but weak and decaying pattern of generalization was observed under the F1 perturbation; the strength of the generalization diminished with increasing dissimilarity from /iau/. No significant transfer of adaptation was found under the perturbation of F2. The details and implications of the pattern of generalization are examined and discussed in light of previous sensorimotor adaptation studies of speech and limb motor control and a neurocomputational model of speech motor control. en_US
dc.description.statementofresponsibility by Shanqing Cai. en_US
dc.format.extent 65 p. en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. en_US
dc.rights.uri http://dspace.mit.edu/handle/1721.1/7582 en_US
dc.subject Electrical Engineering and Computer Science. en_US
dc.title Adaptive auditory-motor control of the time-varying formant trajectories in vowels and its patterns of generalization en_US
dc.type Thesis en_US
dc.description.degree S.M. en_US
dc.contributor.department Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. en_US
dc.identifier.oclc 792751615 en_US


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