4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

Simulation of Disordered Speech Using a Frequency-Domain Vocal Tract Model

Li Deng (1), Xuemin Shen (1), D. G. Jamieson (2), J. Till (3)

(1) Department of Electrical and Computer Engineering, University of Waterloo, Ontario, Canada
(2) Hearing Health Care Research Unit, University of Western Ontario, London, Ontario, Canada
(3) Department of Speech Pathology, Veterans Administration Hospital, Santa Barbara, CA

In this paper, we address the issue of how the perception of disorderness in selected types of speech disorders may be correlated with the abnormal articulatory structure and with the related acoustic properties. As a first step towards this end we have developed an articulatory synthesizer based on frequency-domain simulation of vocal-tract wave propagation. The synthesizer has been implemented by three numerical methods - Runge-Kutta, ABCD matrix, and Finite difference, which provide frequency-domain solutions to the transmission-line equation characterizing a lossy vocal tract. The synthesizer is applied in preliminary experiments where the synthesizerís outputs are used to match samples from a corpus of steady-state speech sound, obtained from a dysarthric speaker, uttered in the /hV/ context.

Full Paper

Bibliographic reference.  Deng, Li / Shen, Xuemin / Jamieson, D. G. / Till, J. (1996): "Simulation of disordered speech using a frequency-domain vocal tract model", In ICSLP-1996, 768-771.