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oai:recercat.cat:20.500.14342/57292025-12-25T01:54:11Zcom_2072_482405com_2072_183628col_2072_482415

00925njm 22002777a 4500 dc Arnela, Marc author Dabbaghchian, Saeed author Bladin, Rémi author Guasch, Oriol author Engwall, Olov author Van Hirtum, Annemie author Pelorson, Xavier author 2016-09-15 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 [ɑ], [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. 0001-4966 http://hdl.handle.net/20.500.14342/5729 https://doi.org/10.1121/1.4962488 Vocal tract acoustics Human voice Acoustical properties Acoustic field Vowel systems Wave propagation Computer simulation Finite-element analysis Partial differential equations Organs Influence of vocal tract geometry simplifications on the numerical simulation of vowel sounds