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Editor-in-chief

 
Faculty of Science, University of Brunei Darussalam, Brunei Darussalam   
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IJIEE 2011 Vol.1(3): 223-228 ISSN: 2010-3719
DOI: 10.7763/IJIEE.2011.V1.35

A Parameterized Geometric Model of the Oral Tract for Aero acoustic Simulation of Fricatives

Julien Cisonni, Kazunori Nozaki, Annemie Van Hirtum, and Shigeo Wada
Abstract—The sound generated during the production of the sibilant [s] results from the impact of a turbulent jet on the incisors. Physical modeling of this phenomenon depends on the characterization of the turbulent flow within the vocal tract and of the acoustic sources resulting from the presence of an obstacle in the path of the flow. The properties of the flow-induced noise strongly depend on several geometric parameters of which the influence has to be determined. In this paper, a simplified geometric model of the oral tract is used to carry out a numerical study of the flow-induced noise generated by a turbulent flow. It is shown from the numerical simulations performed that the modification of the configuration of the geometric model influences the behavior of the turbulent flow and hence the spectral properties and the level of the flow-induced noise generated.

Index Terms—Aero acoustic modeling, fricatives, Large-Eddy Simulation, sibilant [s].

J. Cisonni is with the Center for Advanced Medical Engineering and Informatics, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan (e-mail: julien.cisonni@gmx.com).
K. Nozaki is with the Department of Mechanical Science & Bioengineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan (e-mail: nozaki@dentgrid.org).
A. Van Hirtum is with GIPSA-lab, UMR CNRS 5216, Grenoble University, 961 rue de la Houille Blanche, BP 46, 38402 Grenoble Cedex, France (e-mail: annemie.vanhirtum@gipsa-lab.grenoble-inp.fr).
S. Wada is with the Department of Mechanical Science & Bioengineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan (e-mail: shigeo@me.es.osaka-u.ac.jp).

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Cite: Julien Cisonni, Kazunori Nozaki, Annemie Van Hirtum, and Shigeo Wada, "A Parameterized Geometric Model of the Oral Tract for Aero acoustic Simulation of Fricatives," International Journal of Information and Electronics Engineering vol. 1, no. 3, pp. 223-228, 2011.

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