High-speed finite element computation in 3D acoustical analysis of vocal tract

This paper discusses computational techniques and the way to provide the boundary conditions in order to derive the transfer function of the vocal tract by a three‐dimensional finite element analysis of vocal tract acoustic analysis in a short time. With regard to computational techniques, a solution of the simultaneous equations by successive use of iterative solution, taking the solution at a certain frequency as the initial value, and the use of the finite difference method in part of the analysis domain, are discussed. With regard to the method of providing the boundary condition, the boundary condition at the lip radiating section is discussed. By combining the techniques proposed in this paper, the derivation of the vocal tract transfer function can be accelerated by a factor of as much as 14. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 86(11): 21–29, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjc.10091