Effect of source-tract acoustical coupling on the oscillation onset of the vocal folds.

  title={Effect of source-tract acoustical coupling on the oscillation onset of the vocal folds.},
  author={Jorge C. Lucero and K{\'e}lem Gomes Lourenço and Nicolas Hermant and Annemie Van Hirtum and Xavier Pelorson},
  journal={The Journal of the Acoustical Society of America},
  volume={132 1},
This paper analyzes the interaction between the vocal folds and vocal tract at phonation onset due to the acoustical coupling between both systems. Data collected from a mechanical replica of the vocal folds show that changes in vocal tract length induce fluctuations in the oscillation threshold values of both subglottal pressure and frequency. Frequency jumps and maxima of the threshold pressure occur when the oscillation frequency is slightly above a vocal tract resonance. Both the downstream… 

Modal locking between vocal fold and vocal tract oscillations: Experiments and statistical analysis

The human vocal folds are known to interact with the vocal tract acoustics during voiced speech production; namely a nonlinear source-filter coupling has been observed both by using models and in

Interaction Mechanisms between Glottal Source and Vocal Tract in Pitch Glides

In simulated glottal flow waveforms, the tendency towards a formant ripple increases when acoustic feedback to glottAl flow is enabled, whereas the phenomenon occurs more rarely as a result of the direct acoustic pressure to vocal folds.

Experimental study on source-filter interaction using physical model of the vocal folds

The purpose of the present study is to reproduce the nonlinear phenomena induced by the source-filter interaction using physical models of the vocal folds and observed resonance effect, quenching, and subharmonics induced byThe nonlinear source- filter interaction as F1 crossed F0.

Modal locking between vocal fold and vocal tract oscillations: Simulations in time domain

It is well known that during voiced speech, the human vocal folds interact with the vocal tract acoustics. The resulting source-lter coupling has been observed using mathematical and physical models

Modeling of aerodynamic interaction between vocal folds and vocal tract during production of a vowel-voiceless plosive-vowel sequence.

Simulation results suggest that the realization of an occlusion of the vocal tract produces a passive increase in glottal area associated with a voice offset and that the expansion of the supraglottal cavity is responsible for the extension of the phonation up to 40 ms after closure of the lips.

Study of the effects of vocal tract constriction on glottal vibration.

Effects of constriction can indeed be observed in the features of glottal vibration as well as vocal tract resonances, as shown in the studies on speech and electroglottograph signals.

Acoustic and Aerodynamic Coupling during Phonation in MRI-Based Vocal Tract Replicas

Voiced speech is the result of a fluid-structure-acoustic interaction in larynx and vocal tract (VT). Previous studies show a strong influence of the VT on this interaction process, but are limited

Estimation of Source-Filter Interaction Regions Based on Electroglottography.

Self-entrainment of the right and left vocal fold oscillators.

An analysis of entrained oscillations of the right and left vocal folds in the presence of asymmetries is presented, showing that the damping asymmetry expands the 1:1 entrainment region at low subglottal pressures across the whole asymmetry range.



Nonlinear source-filter coupling in phonation: theory.

  • I. Titze
  • Physics
    The Journal of the Acoustical Society of America
  • 2008
A theory of interaction between the source of sound in phonation and the vocal tract filter is developed and positive reinforcement of the harmonics by supraglottal inertive reactance (and to a lesser degree by subglottal compliant reactance) is shown to be influenced by interaction.

Voice instabilities due to source-tract interactions

Interactions of voice source and vocal tract resonances are of particular interest with respect to register transitions and bioacoustics. There is experimental evidence that singing into a tube

The physics of small-amplitude oscillation of the vocal folds.

  • I. Titze
  • Physics
    The Journal of the Acoustical Society of America
  • 1988
It is shown that vocal tract inertance reduces the oscillation threshold pressure, whereas vocal tract resistance increases it, and the treatment is harmonized with former treatments based on two-mass models and collapsible tubes.

A theoretical study of the hysteresis phenomenon at vocal fold oscillation onset-offset.

  • J. Lucero
  • Physics
    The Journal of the Acoustical Society of America
  • 1999
The dynamics of the oscillation is analyzed from the perspective of the theory of nonlinear dynamical systems, using a mucosal wave model of the vocal folds with the subglottal pressure and the vocal fold half-width as control parameters.

Influence of vocal fold stiffness and acoustic loading on flow-induced vibration of a single-layer vocal fold model.

Vocal fold and ventricular fold vibration in period-doubling phonation: physiological description and aerodynamic modeling.

The physiological correlates of this acoustical production of Sardinian A Tenore Bassu vocal performance are characterized and a better understanding of the physical interaction between ventricular fold vibration and vocal fold self-sustained oscillation is provided.

Nonlinear source-filter coupling in phonation: vocal exercises.

Results indicated that the bifurcations occur more often in phonations with F(0)-F(1) crossovers, suggesting that nonlinear source-filter coupling is partly responsible for source instabilities.

Biomechanical modeling of register transitions and the role of vocal tract resonators.

Simulations for increasing and decreasing subglottal pressure reveal that the phonation onset exhibits amplitude jumps and hysteresis referring to a subcritical Hopf bifurcation, and experiment of glissando singing shows that the supraglottis has indeed an influence on the register transition.

Negative Coulomb damping, limit cycles, and self-oscillation of the vocal folds

An effective one-mass model of phonation is developed. It borrows the salient features of the classic two-mass model of human speech developed by Ishizaka, Matsudaira, and Flanagan. Their model is

A lumped mucosal wave model of the vocal folds revisited: recent extensions and oscillation hysteresis.

An updated version of a lumped mucosal wave model of the vocal fold oscillation during phonation is examined, finding that an oscillation hysteresis phenomenon may occur, with different values for the oscillation onset and offset threshold.