Sixth International Conference on Spoken Language Processing
October 16-20, 2000
Computation of 3-D Vocal Tract Acoustics Based on Mode-Matching Technique
Kunitoshi Motoki (1), Xavier Pelorson (2), Pierre Badin (2), Hiroki Matsuzaki (1)
(1) Department of Electronics and Information Engineering, Hokkai-Gakuen University
A model for calculating the acoustic characteristics of 3-D
vocal tract configuration is presented. A mode-matching
technique and an impedance transformation are used to
calculate the higher-order modes in this model where both
propagative and evanescent higher-order modes are considered.
A cascaded structure of rectangular acoustic tubes
is introduced as an approximation of the real vocal tract
geometry. The number of higher-order modes in each tube
can be selected independently, which significantly decreases
the instability of computation caused by the evanescent
higher-order modes. Preliminary calculation results are
discussed from the view point of the influences
of the offset connection of tubes.
(2) Institut de la Communication Parlée, UMR CNRS 5009, INPG-Université Stendhal,
Motoki, Kunitoshi / Pelorson, Xavier / Badin, Pierre / Matsuzaki, Hiroki (2000):
"Computation of 3-d vocal tract acoustics based on mode-matching technique",
In ICSLP-2000, vol.1, 461-464.