期刊
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
卷 140, 期 3, 页码 1707-1718出版社
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.4962488
关键词
-
资金
- EU-FET Grant EUNISON [308874]
For many years, the vocal tract shape has been approximated by one-dimensional (1D) area functions to study the production of voice. More recently, 3D approaches allow one to deal with the complex 3D vocal tract, although area-based 3D geometries of circular cross-section are still in use. However, little is known about the influence of performing such a simplification, and some alternatives may exist between these two extreme options. To this aim, several vocal tract geometry simplifications for vowels [A], [i], and [u] are investigated in this work. Six cases are considered, consisting of realistic, elliptical, and circular cross-sections interpolated through a bent or straight midline. For frequencies below 4-5 kHz, the influence of bending and cross-sectional shape has been found weak, while above these values simplified bent vocal tracts with realistic cross-sections are necessary to correctly emulate higher-order mode propagation. To perform this study, the finite element method (FEM) has been used. FEM results have also been compared to a 3D multimodal method and to a classical 1D frequency domain model. (C) 2016 Acoustical Society of America.
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