Applied Research Laboratory, Pennsylvania State University, State College, Pennsylvania 16803, USA.
J Acoust Soc Am. 2019 Aug;146(2):1230. doi: 10.1121/1.5122787.
This paper presents measurements conducted in a physical model of the adult human airway. The goals of this work are to (1) benchmark the physical model to excised larynx models in the literature and (2) empirically demonstrate the relationship between vocal fold drag and sound production. Results from the airway model are first benchmarked to published time-averaged behavior of excised larynx models. The airway model in this work exhibited higher glottal volume flow, lower glottal resistance, and less fundamental frequency variation than excised larynx models. Next, concurrent measurements of source behavior and radiated sound were compared. Unsteady transglottal pressure (a surrogate measure for vocal fold drag) and radiated sound, measured at the mouth, showed good correlation. In particular, the standard deviation and the ratio of the power of the first and second harmonics of the transglottal and mouth pressures were strongly correlated. This empirical result supports the assertion that vocal fold drag is the principal source of sound in phonation.
本文介绍了在成人气道物理模型中进行的测量。这项工作的目标是：(1) 将物理模型与文献中离体喉模型进行基准测试；(2) 从经验上证明声带阻力与发声之间的关系。气道模型的结果首先与已发表的离体喉模型的时间平均行为进行基准测试。与离体喉模型相比，本工作中的气道模型表现出更高的声门容积流量、更低的声门阻力和更小的基频变化。接下来，对声源行为和辐射声的同时测量进行了比较。跨声门压力（声带阻力的替代测量）和在口部测量的辐射声之间显示出良好的相关性。特别是，跨声门压力和口部压力的基频和二次谐波的功率的标准差和比值具有很强的相关性。这一经验结果支持了声带阻力是发声的主要声源的说法。
