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FEM analysis of three-dimensional acoustic characteristics in a sound tube

✍ Scribed by Hiroki Matsuzaki; Nobuhiro Miki; Yoshihiko Ogawa

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
282 KB
Volume
81
Category
Article
ISSN
1042-0967

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✦ Synopsis

The results of finite element analysis are presented for three-dimensional acoustic characteristics in a sound tube that cannot be obtained by using a one-dimensional analysis. First, a simulation is carried out by using several uniform sound tubes with a circular or elliptical cross section. The radiation impedance is computed so as to study the relationship between the cross section and the radiation impedance. Next, for the vocal tract cross section formed from the MRI data, the acoustic characteristics in elliptic cross sections with equal areas and circumferences are compared to find the validity of the elliptic approximation. Finally, the effects of a constriction of the front teeth on the acoustic characteristics are studied by means of a model with a constriction of simple shape.

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