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A contribution to simulating a three-dimensional larynx model using the finite element method

Summary: A contribution to simulating a three-dimensional larynx model
using the finite element method
Marcelo de Oliveira Rosaa)
and Jose´ Carlos Pereirab)
Depto. Engenharia Ele´trica, Escola de Engenharia de Sa~o Carlos, Universidade de Sa~o Paulo,
Av. Trabalhador sancarlense, 400, 13566-590, Sa~o Carlos, Sa~o Paulo, Brazil
Marcos Grellet
Depto. de Oftalmologia e Otorrinolaringologia, Faculdade de Medicina de Ribeira~o Preto,
Universidade de Sa~o Paulo, Av. Bandeirantes, 3900, 14049-900, Ribeira~o Preto, Sa~o Paulo, Brazil
Abeer Alwan
Speech Processing and Auditory Perception Laboratory, Department of Electrical Engineering,
66-147E Engr. IV, 405 Hilgard Avenue, Box 951594, University of California, Los Angeles, California
Received 3 January 2003; revised 14 August 2003; accepted 25 August 2003
A three-dimensional model is presented to simulate the larynx during vocalization. The finite
element method is used to calculate the airflow velocity and pressure along the larynx as well as
tissue displacement. It is assumed that the larynx tissue is transversely isotropic and divided into
three tissues: cover, ligament, and body. A contact-impact algorithm is incorporated to deal with the
physics of the collision between both true vocal folds. The results show that the simulated larynx
can reproduce the vertical and horizontal phase difference in the tissue movements and that the false
vocal folds affect the pressure distribution over the larynx surfaces. The effects of exciting the


Source: Alwan, Abeer - Electrical Engineering Department, University of California at Los Angeles


Collections: Computer Technologies and Information Sciences