Impact of the Paraglottic Space on Voice Production in an MRI-Based Vocal Fold Model

Wu, Liang; Zhang, Zhaoyan

doi:10.1016/j.jvoice.2021.02.021

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…Activation of the thyroarytenoid and cricothyroid muscles may also restrain the vertical motion ( Zhang, 2011 ). Further studies of such potential restraining mechanisms and their impact on source-filter interaction are needed, by utilizing finite element modeling and realistic laryngeal geometry [e.g., Wu and Zhang (2023) ].…”

Section: Discussionmentioning

confidence: 99%

Restraining vocal fold vertical motion reduces source-filter interaction in a two-mass model

Yoshinaga,

Zhang,

Iida

2024

JASA Express Letters

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Previous experimental studies suggested that restraining the vocal fold vertical motion may reduce the coupling strength between the voice source and vocal tract. In this study, the effects of vocal fold vertical motion on source-filter interaction were systematically examined in a two-dimensional two-mass model coupled to a compressible flow simulation. The results showed that when allowed to move vertically, the vocal folds exhibited subharmonic vibration due to entrainment to the first vocal tract acoustic resonance. Restraining the vertical motion suppressed this entrainment. This indicates that the vertical mobility of the vocal folds may play a role in regulating source-filter interaction.

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Section: Discussionmentioning

confidence: 99%

Restraining vocal fold vertical motion reduces source-filter interaction in a two-mass model

Yoshinaga,

Zhang,

Iida

2024

JASA Express Letters

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“…The agreement may be further improved by more accurately predicting the subglottal and supraglottal pressures. Future work will focus on validating the 1D flow model in vocal fold models with more realistic vocal fold movement (Adachi and Yu, 2005) and geometry (Wu and Zhang, 2021), and for laryngeal sizes typical of female and children.…”

Section: Discussionmentioning

confidence: 99%

Comparison of one-dimensional and three-dimensional glottal flow models in left-right asymmetric vocal fold conditions

Yoshinaga

Zhang²,

Iida

2022

The Journal of the Acoustical Society of America

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While the glottal flow is often simplified as one-dimensional (1D) in computational models of phonation to reduce computational costs, the 1D flow model has not been validated in left-right asymmetric vocal fold conditions, as often occur in both normal and pathological voice production. It is unclear to what extent the 1D model approximates the effect of three-dimensional (3D) flow phenomena and fluid-structure interaction. In this study, we performed 1D and 3D flow simulations coupled with the two-mass vocal fold model and compared vocal fold vibration patterns at different degrees of left-right stiffness asymmetry. The flow and acoustic fields in 3D were predicted by solving the compressible Navier-Stokes equations using the volume penalization method and considering the moving vocal fold wall as an immersed boundary. The results showed that vocal fold vibration amplitudes and left-right phase differences in the 3D flow were predicted by the 1D flow model under conditions of small left-right asymmetry, while vocal fold vibration amplitudes were underestimated at conditions of large left-right asymmetry. This indicates that 1D flow models may be sufficient in modeling phonation under left-right asymmetric conditions, although the performance can be further improved by more accurately predicting air pressure on vocal fold surface.

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“…This number is significantly smaller than the degrees of freedom in typical finite element models of phonation which is often in the order of tens of thousands, thus significantly improving computational efficiency. With the improved computational efficiency, this reduced-order model has been used in a series of large-scale, three-dimensional, parametric studies, using either simplified [97][98][99] or MRI-based realistic vocal fold geometry [93,100]. The large number of conditions investigated (about 200,000 vocal fold conditions) allowed for the first time a systematic investigation of the global cause-effect relationship between vocal fold physiology (vocal fold geometry, stiffness, and subglottal pressure) and voice outcomes (vocal fold vibration, glottal flow, and voice acoustics) in a large range of vocal conditions.…”

Section: Reduced-order Models Of Phonationmentioning

confidence: 99%

Overview on state-of-the-art numerical modeling of the phonation process

et al. 2023

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Numerical modeling of the human phonatory process has become more and more in focus during the last two decades. The increase in computational power and the use of high-performance computation (HPC) yielded more complex models being closer to the actual fluid-structure-acoustic interaction (FSAI) within the human phonatory process. However, several different simulation approaches with varying mathematical complexity and focus on certain parts of the phonatory process exist. Currently, models are suggested based on ordinary differential equations (reduced order models) but also on partial differential equations based on continuum mechanics as e.g. the Navier–Stokes equations for the flow discretized by Finite-Volume or Finite-Element-Methods. This review will illuminate current trends and recent progress within the area. In summary, the ultimate simulation model satisfying all physiological needs and scientific opinions still has to be developed.

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Impact of the Paraglottic Space on Voice Production in an MRI-Based Vocal Fold Model

Cited by 9 publications

References 38 publications

Restraining vocal fold vertical motion reduces source-filter interaction in a two-mass model

Restraining vocal fold vertical motion reduces source-filter interaction in a two-mass model

Comparison of one-dimensional and three-dimensional glottal flow models in left-right asymmetric vocal fold conditions

Overview on state-of-the-art numerical modeling of the phonation process

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