An extension of Heinz and Stevens’ αβ model [Proc. of 5th Int. Congr. Acoust. A44 (1965)], where α continuously depends on both midsagittal distance and VT position (along the midline), has been optimized from x‐ray cineradiographs and formant frequencies obtained on a set of vowels and fricatives uttered by a subject. The purpose of the study was to recover the midsagittal function (a vector of 50 midsagittal distances) of fricative consonants from the measured formant frequencies, in [VCV] contexts. In order to reduce the excess degrees of freedom of this ill‐posed problem, the proposed model has been used as a major way to constrain an optimization algorithm based on a gradient descent technique. The gradient of the error between actual and desired formant values is computed through a back‐propagation network implementing both sagittal‐to‐area conversion and acoustic wave propagation. Preliminary results are presented and discussed. [Work partly supported by CNRS & CEC‐ESPRIT project SPEECH MAPS.]
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April 1993
April 01 1993
Using a new model of vocal‐tract midsagittal profile to area‐function conversion to constrain an optimization algorithm for the articulatory‐acoustic inversion of fricative consonants
Pierre Badin;
Pierre Badin
Inst. de la Commun. Parlée, 46 Ave. Félix Viallet, 38031 Grenoble Cedex, France
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Denis Beautemps;
Denis Beautemps
Inst. de la Commun. Parlée, 46 Ave. Félix Viallet, 38031 Grenoble Cedex, France
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Rafael Laboissière
Rafael Laboissière
Inst. de la Commun. Parlée, 46 Ave. Félix Viallet, 38031 Grenoble Cedex, France
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J. Acoust. Soc. Am. 93, 2416–2417 (1993)
Citation
Pierre Badin, Denis Beautemps, Rafael Laboissière; Using a new model of vocal‐tract midsagittal profile to area‐function conversion to constrain an optimization algorithm for the articulatory‐acoustic inversion of fricative consonants. J. Acoust. Soc. Am. 1 April 1993; 93 (4_Supplement): 2416–2417. https://doi.org/10.1121/1.405915
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