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

Influence of vocal tract geometry simplifications on the numerical simulation of vowel sounds Arnela, Marc Dabbaghchian, Saeed Bladin, Rémi Guasch, Oriol Engwall, Olov Van Hirtum, Annemie Pelorson, Xavier Universitat Ramon Llull. La Salle KTH Royal Institute of Technology Université Grenoble Alpes Vocal tract acoustics Human voice Acoustical properties Acoustic field Vowel systems Wave propagation Computer simulation Finite-element analysis Partial differential equations Organs 004 53 531/534 537 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. info:eu-repo/semantics/publishedVersion 2016-09-15 info:eu-repo/semantics/article 0001-4966 http://hdl.handle.net/20.500.14342/5729 https://doi.org/10.1121/1.4962488 eng Journal of the Acoustical Society of America (2016), Vol. 140, Nº3, pp 1707-1718 © Acoustical Society of America. Tots els drets reservats info:eu-repo/semantics/openAccess 12 p. Acoustical Society of America