Vocal Tract Area Function Estimation From Midsagittal Dimensions With CT Scans and a Vocal Tract Cast Modeling the Transition With Two Sets of Coefficients Research Article
Research Article  |   February 01, 1992
Vocal Tract Area Function Estimation From Midsagittal Dimensions With CT Scans and a Vocal Tract Cast
 
Author Affiliations & Notes
  • Pascal Perrier
    Institut de la Communication Parlée URA CNRS 368 INPG & Université Stendhal Grenoble, France
  • Louis-Jean Boë
    Institut de la Communication Parlée URA CNRS 368 INPG & Université Stendhal Grenoble, France
  • Rudolph Sock
    Institut de la Communication Parlée URA CNRS 368 INPG & Université Stendhal Grenoble, France
Article Information
Telepractice & Computer-Based Approaches / Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   February 01, 1992
Vocal Tract Area Function Estimation From Midsagittal Dimensions With CT Scans and a Vocal Tract Cast
Journal of Speech, Language, and Hearing Research, February 1992, Vol. 35, 53-67. doi:10.1044/jshr.3501.53
History: Received January 31, 1990 , Accepted February 9, 1991
 
Journal of Speech, Language, and Hearing Research, February 1992, Vol. 35, 53-67. doi:10.1044/jshr.3501.53
History: Received January 31, 1990; Accepted February 9, 1991

The generation of area functions from measurements of the sagittal section is an important step in the study of the relation between vocal tract geometry and speech acoustics. We present a new model to perform this transformation, inspired by the αβ model of Heinz  & Stevens (1965) . Our model is based on analysis of a vocal tract cast for large sagittal dimensions and for small sagittal dimensions on CT scans of the vocal tract constriction zones for the three cardinal vowels [i, a, u] of French. We extracted two sets of coefficients, appropriate for large and small sagittal dimensions respectively. We then compared the predictions of the model with those of other models from the literature. Finally, the usefulness of this dual coefficient procedure for the acoustic simulation of vowels was tested using sagittal sections generated by an acoustic model of the vocal tract.

Acknowledgments
Our sincere thanks go to Professor Lebeau and to Professor Crouzet of the Grenoble CHU, who guided us in measurement procedures both on scanners and on the cast, and without whose help this work would never have existed. We are sincerely grateful to Tom Sawallls of the ICP, Grenoble, and the IASCP, University of Florida, Gainesville, for reworking the text while correcting the English. This research was sponsored by a CNET–Lannion grant (Convention CNET nb 87 78 07200790 92 45 LAA/TSS/CMC).
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