Influence of a constriction in the near field of the vocal folds: Physical modeling and experimental validation
Influence of a constriction in the near field of the vocal folds: Physical modeling and experimental validation
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DOI：
10.1121/1.2977740
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发表时间：
2008-11-01
影响因子：
2.4
通讯作者：
Ruty, Nicolas
中科院分区：
文献类型：
--
作者：
Bailly, Lucie;Pelorson, Xavier;Ruty, Nicolas
在人类发声中，特别是在病理性发声和/或某些喉部歌唱发声中，经常观察到心室皱襞的参与。本研究旨在利用合适的体外设置，允许稳定和不稳定的流动条件，探索和模拟心室和声带之间可能的空气动力相互作用。这两个实验装置由刚性和自振荡声带复制品组成，在两种情况下都与下游刚性心室折叠复制品耦合。提出了理论流动模型来量化心室褶皱对压力分布以及声带振动的空气动力学影响。声带的机械行为是通过考虑这种影响的分布式模型来模拟的。在两种血流条件下测量心室收缩的影响并与模型结果进行比较。这项研究客观地评估了喉部心室收缩所带来的额外压降。事实证明，这种收缩可以促进或阻碍声门振动，具体取决于喉部的几何结构。讨论了使用静态或动态声带复制品的相关性。 (C) 2008 年美国声学学会。 [DOI：10.1121/1.2977740]
The involvement of the ventricular folds is often observed in human phonation and, in particular, in pathological and or some throat-singing phonation. This study aims to explore and model the possible aerodynamic interaction between the ventricular and vocal folds using suitable in vitro setups allowing steady and unsteady flow conditions. The two experimental setups consist of a rigid and a self-oscillating vocal-fold replica, coupled to a downstream rigid ventricular-fold replica in both cases. A theoretical flow modeling is proposed to quantify the aerodynamic impact of the ventricular folds on the pressure distribution and thereby on the vocal-fold vibrations. The mechanical behavior of the vocal folds is simulated by a distributed model accounting for this impact. The influence of the ventricular constriction is measured in both flow conditions and compared to the model outcome. This study objectively evaluates the additional pressure drop implied by the presence of a ventricular constriction in the larynx. It is demonstrated that such constriction can either facilitate or impede the glottal vibrations depending on the laryngeal geometrical configuration. The relevance of using static or dynamic vocal-fold replicas is discussed. (C) 2008 Acoustical Society of America. [DOI: 10.1121/1.2977740]