Simulation of disordered speech using a frequency-domain vocal tract model
Li Deng, X. Shen, Donald G. Jamieson, James A. Till · 2002
Addresses the issue of how the perception of disorder in selected types of speech disorders may be correlated with abnormal articulatory structure and with related acoustic properties. As a first step towards this end, we have developed an articulatory synthesiser based on a frequency-domain simulation of vocal-tract wave propagation. The synthesiser has been implemented by three numerical methods-Runge-Kutta, ABCD matrix and finite differences-which provide frequency-domain solutions to the transmission-line equation characterizing a lossy vocal tract. The synthesiser is applied in preliminary experiments where the its outputs are used to match samples from a corpus of steady-state speech sound, obtained from a dysarthric speaker, uttered in the /hV/ context.