Role of gradients in vocal fold elastic modulus on phonation.

Role of gradients in vocal fold elastic modulus on phonation.
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声带弹性模量梯度对发声的作用。

DOI:
10.1016/j.jbiomech.2015.06.015
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发表时间:
2015
影响因子:
2.4
通讯作者:
Siegmund,Thomas
Siegmund,Thomas
中科院分区:
工程技术3区
文献类型:
--
作者:
Bhattacharya,Pinaki;Kelleher,JordanE;Siegmund,Thomas

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新的研究表明,声带(VF)的弹性特性局部变化。特别地,在沿着VF韧带的长度的弹性模量的分布中存在强梯度,VF韧带是VF组织的重要承载成分。有进一步的证据表明,VF健康的变化与模量梯度的改变有关。VF模量分级对VF振动和发声的作用尚未被探索。在这项研究中,VF弹性模量的梯度的大小是不同的,并进行了复杂的计算模拟的三维VF的自振荡与现实的气流物理特性建模。结果表明,发声频率、变形和相位差的特征模式、声门气流速率、发声输出的频谱宽度和声门射流动力学都依赖于VF弹性模量梯度的大小。研究结果有助于理解VF功能分级如何导致语音质量的可感知变化。
New studies show that the elastic properties of the vocal folds (VFs) vary locally. In particular strong gradients exist in the distribution of elastic modulus along the length of the VF ligament, which is an important load-bearing constituent of the VF tissue. There is further evidence that changes in VF health are associated with alterations in modulus gradients. The role of VF modulus gradation on VF vibration and phonation remains unexplored. In this study the magnitude of the gradient in VF elastic modulus is varied, and sophisticated computational simulations are performed of the self-oscillation of three-dimensional VFs with realistic modeling of airflow physical properties. Results highlight that phonation frequency, characteristic modes of deformation and phase differences, glottal airflow rate, spectral-width of vocal output, and glottal jet dynamics are dependent on the magnitude of VF elastic modulus gradation. The results advance the understanding of how VF functional gradation can lead to perceptible changes in speech quality.
DOI: 10.1016/s0892-1997(96)80043-9
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