Intraglottal pressure profiles for a symmetric and oblique glottis with a divergence angle of 10 degrees
Intraglottal pressure profiles for a symmetric and oblique glottis with a divergence angle of 10 degrees
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DOI：
10.1121/1.1333420
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发表时间：
2001-04-01
影响因子：
2.4
通讯作者：
Afjeh, AA
中科院分区：
文献类型：
--
作者：
Scherer, RC;Shinwari, D;Afjeh, AA
人类发声并不总是涉及两个声带的对称运动。不对称运动会产生倾斜或倾斜的声门角度。本研究报告了喉部有机玻璃模型的声门内压力分布，该模型的声门具有 10 度的发散角，并且具有对称方向或 15 度的倾斜角。对于斜声门，一侧发散，另一侧收敛。声带表面有 14 个压力孔。最小声门直径保持恒定在 0.04 厘米。结果表明，无论是对称还是倾斜情况，除了 3 cm H(2)O 的经声门压力的对称几何结构外，声门两侧的压力分布不同。对于对称情况，流动分离在流动附着在壁上的一侧产生较低的压力，并且通道两侧之间的最大压差是跨声门压力的5%-6%。对于倾斜情况，声门入口和出口附近发散声门侧的压力较低，声门入口处的跨通道压力与跨声门压力相差 27%。经验压力分布得到了计算结果的支持。观察到的空气动力学不对称可能是导致正常抖动值和声带相位差异的一个因素。 (C) 2001 年美国声学学会。
Human phonation does not always involve symmetric motions of the two vocal folds. Asymmetric motions can create slanted or oblique glottal angles. This study reports intraglottal pressure profiles for a Plexiglas model of the larynx with a glottis having a 10-degree divergence angle and either a symmetric orientation or an oblique angle of 15 degrees. For the oblique glottis, one side was divergent and the other convergent. The vocal fold surfaces had 14 pressure taps. The minimal glottal diameter was held constant at 0.04 cm. Results indicated that for either the symmetric or oblique case, the pressure profiles were different on the two sides of the glottis except for the symmetric geometry for a transglottal pressure of 3 cm H(2)O. For the symmetric case, flow separation created lower pressures on the side where the flow stayed attached to the wall, and the largest pressure differences between the two sides of the channel were 5%-6% of the transglottal pressure. For the oblique case, pressures were lower on the divergent glottal side near the glottal entry and exit, and the cross-channel pressures at the glottis entrance differed by 27% of the transglottal pressure. The empirical pressure distributions were supported by computational results. The observed aerodynamic asymmetries could be a factor contributing to normal jitter values and differences in vocal fold phasing. (C) 2001 Acoustical Society of America.