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Updated: Jul 17, 2026

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
10:16

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Published on: December 2, 2011

Using the relaxation oscillations principle for simple phonation modeling.

Renaud Garrel1, Ronald Scherer, Richard Nicollas

  • 1Laboratoire d'Audio Phonologie Clinique UPRES-EA CHU la Timone, Marseille, France. r-garrel@chu-montpellier.fr <r-garrel@chu-montpellier.fr>

Journal of Voice : Official Journal of the Voice Foundation
|February 7, 2007
PubMed
Summary

A simple one-mass model using relaxation oscillations effectively simulates vocal fold dynamics. This model simplifies complex harmonic oscillation models, offering insights into fundamental frequency and vibration amplitude control.

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Published on: November 25, 2017

Area of Science:

  • Biomechanics
  • Acoustic phonetics
  • Vocal fold dynamics

Background:

  • Multimass models of vocal folds, while informative, can be complex due to their reliance on harmonic oscillation.
  • A simplified approach is needed to better understand the fundamental principles of glottal dynamics.

Purpose of the Study:

  • To demonstrate that a simple one-mass model based on relaxation oscillations can accurately represent vocal fold behavior.
  • To detail the theory of relaxation oscillations and apply it to vocal fold modeling.

Main Methods:

  • Developed a one-mass relaxation oscillation model for vocal fold dynamics.
  • Performed numerical simulations using standard tissue characteristics and subglottal pressure values.
  • Analyzed the effects of mass, stiffness, and subglottal pressure on fundamental frequency and vibrational amplitude.

Main Results:

  • Increased mass decreased fundamental frequency (F0) and increased vibration amplitude.
  • Stiffness had an inverse effect on F0 and amplitude.
  • Subglottal pressure linearly controlled F0 (20-50 Hz/kPa) and vibrational amplitude (0.22-0.26 mm/kPa).
  • Phonation threshold pressure (PTP) ranged from 0.1 to 1 kPa, varying with F0.

Conclusions:

  • A one-mass relaxation oscillation model provides a simple yet effective tool for simulating vocal fold vibration.
  • This model offers a more accessible understanding of glottal dynamics compared to complex multimass models.
  • The findings highlight the significant roles of mass, stiffness, and subglottal pressure in voice production.