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

Marcelo de Oliveira Rosa1, José Carlos Pereira, Marcos Grellet

  • 1Depto. Engenharia Elétrica, Escola de Engenharia de São Carlos, Universidade de São Paulo, Av. Trabalhador sancarlense, 400, 13566-590, São Carlos, São Paulo, Brazil.

The Journal of the Acoustical Society of America
|December 3, 2003
PubMed
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This study presents a 3D larynx model simulating vocalization. The model accurately reproduces vocal fold movements and shows how false vocal folds influence airflow pressure.

Area of Science:

  • Biomechanics
  • Acoustic Science
  • Computational Fluid Dynamics

Background:

  • Understanding vocal fold dynamics is crucial for voice production.
  • Accurate simulation of the larynx requires sophisticated modeling techniques.

Purpose of the Study:

  • To develop and validate a three-dimensional computational model of the larynx for vocalization simulation.
  • To investigate the biomechanical behavior of vocal fold tissues and airflow dynamics.

Main Methods:

  • Finite element method (FEM) for airflow velocity, pressure, and tissue displacement calculations.
  • Modeling the larynx with transversely isotropic tissue (cover, ligament, body).
  • Incorporation of a contact-impact algorithm for true vocal fold collisions.

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Main Results:

  • The model successfully reproduced vertical and horizontal phase differences in vocal fold tissue movements.
  • Demonstrated that false vocal folds significantly impact pressure distribution on larynx surfaces.
  • Investigated the effects of varying pressure drops on laryngeal function.

Conclusions:

  • The developed 3D larynx model provides a valuable tool for studying vocalization biomechanics.
  • Highlights the role of false vocal folds in modulating laryngeal airflow and pressure.
  • Offers insights into the complex physics of voice production.