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ERIC Number: ED555180
Record Type: Non-Journal
Publication Date: 2013
Pages: 171
Abstractor: As Provided
Reference Count: N/A
ISBN: 978-1-3032-9923-0
An MRI-Based Morphological Approach to Vocal Tract Area Function Estimation
Tiede, Mark Kenneth
ProQuest LLC, Ph.D. Dissertation, Yale University
Volumetric MRI data has been collected during the sustained production of American English and Japanese vowels. Six native speakers (5 male, 1 female) produced nine steady-state American English vowels, and six native speakers (5 male, 1 female) produced the Japanese five vowel inventory. New methods have been developed for identifying the vocal tract airway within such data, resulting in a characterization of cross-sectional area that preserves shape information. Results have been tested through comparison of transfer function spectra derived from these characterizations with those obtained from recorded productions from the same speakers. In addition to reporting standard area function results, a novel form of parameterization is described that can be used to estimate the vocal tract shape associated with a target vowel from just four weights. Because it provides a mapping between some offset along the tract and the corresponding cross-sectional shape, this "shape-based" approach can be viewed as a superset of existing area function predictors, since area is readily obtained from polygonal shape by triangulation methods. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page:]
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Publication Type: Dissertations/Theses - Doctoral Dissertations
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A