National Center for Voice and Speech, The University of Utah, 136 South Main Street, Suite 320, Salt Lake City, Utah 84101, USA.
J Acoust Soc Am. 2019 Feb;145(2):881. doi: 10.1121/1.5091099.
The effective depth of vocal fold vibration is self-regulated and generally not known a priori in vocalization. In this study, the effective depth was quantified systematically under various phonatory conditions using a fiber-gel finite element vocal fold model. The horizontal and vertical excursions of each finite element nodal point trajectory were recorded to compute trajectory areas. The extent of vibration was then studied based on the variation of trajectory radii as a function of depth in several coronal sections along the anterior-posterior direction. The results suggested that the vocal fold nodal trajectory excursions decrease systematically as a function of depth but are affected by the layered structure of the vocal folds. The effective depth of vibration was found to range between 15 and 55% of the total anatomical depth across all phonatory conditions. The nodal trajectories from the current study were compared qualitatively with the results from excised human hemi-larynx experiments published in Döllinger and Berry [(2006). J. Voice. 20(3), 401-413]. An estimate of the effective mass of a one-mass vocal fold model was also computed based on the effective depth of vibration observed in this study under various phonatory conditions.
声带振动的有效深度是自我调节的，通常在发声中是未知的。在这项研究中，使用纤维凝胶有限元声带模型，在各种发音条件下系统地量化了有效深度。记录每个有限元节点轨迹的水平和垂直位移，以计算轨迹面积。然后根据轨迹半径随深度在前-后方向上的几个冠状面的变化来研究振动的程度。结果表明，声带节点轨迹的位移随深度的增加而系统地减小，但受到声带分层结构的影响。在所有发音条件下，振动的有效深度范围在总解剖深度的 15%至 55%之间。当前研究的节点轨迹与 Döllinger 和 Berry [（2006）发表的离体人半喉实验结果进行了定性比较。J. Voice. 20（3），401-413]。还根据本研究在各种发音条件下观察到的振动有效深度，计算了单质量声带模型的有效质量估计值。
