5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

FEM Analysis of Aspirated Air Flow in Three-Dimensional Vocal Tract During Fricative Consonant Phonation

Takuya Niikawa (1), Masafumi Matsumura (1), Takashi Tachimura (2), Takeshi Wada (2)

(1) Osaka Electro-Communication University, Japan
(2) Osaka University, Japan

This paper deals with estimations of aspirated air flow in a three-dimensional vocal tract during fricative consonant phonation using the Finite Element Method (FEM). The shape of the 3-D vocal tract during phonation of fricative consonant /s/ is reconstructed from 32 coronal Magnetic Resonance (MR) images. MR images of the dental crown that contains a small amount of water were obtained using a dental crown plate. A 3-D FEM vocal tract model is formed so that the number of elements is 28686, the number of nodes is 7010, and a rigid wall constitutes the vocal tract wall. Results showed that the flow rate was high at the narrow space made between the upper central incisors and the tongue surface. An electric equivalent circuit for fricative consonant phonation was designed in consideration of the location of the noise source.

Full Paper

Bibliographic reference.  Niikawa, Takuya / Matsumura, Masafumi / Tachimura, Takashi / Wada, Takeshi (1998): "FEM analysis of aspirated air flow in three-dimensional vocal tract during fricative consonant phonation", In ICSLP-1998, paper 0509.