University of Houston, Houston, Texas.
J Voice. 2020 Jul;34(4):533-538. doi: 10.1016/j.jvoice.2019.02.014. Epub 2019 Mar 20.
The purpose of this study was to examine how the s/z ratio and instrumental measures of laryngeal valving and voicing efficiency.
Prospective, cohort design.
Fifteen adult males (mean age 28.3 years) and 15 adult females (mean age 29.2 years) with normal voice quality were recruited and compared on productions of the s/z ratio and instrumental aerodynamic measures. The aerodynamic measures included vital capacity, maximum phonation time, airflow rate during sustained and sentence production, subglottal pressure, and laryngeal airway resistance. These measures were obtained on the Phonatory Aerodynamic System Model 6600. Statistical analyses included a univariate analysis of variance to examine for differences between sexes for all the variables, and between the s/z ratios for each of the three trials. Pearson's Product Moment Correlations were performed to identify the strength and nature of any significant relationships between the s/z ratio and instrumental aerodynamics.
There were significant differences in the mean values between males and females only for the measures of vital capacity and maximum phonation time. There were no significant differences between the three trials for the s/z ratio. There was a significant moderate negative correlation between the s/z ratio and laryngeal airway resistance in females and between the s/z ratio and sentence airflow rate in males.
The s/z ratio demonstrated only a moderate correlation with limited instrumental measures of laryngeal valving. In the absence of clear evidence of its ability to accurately assess laryngeal valving, the s/z ratio should be used in combination with other instrumental measures of laryngeal aerodynamics for a better representation of aerodynamic functioning.
本研究旨在探讨 s/z 比值与喉阀和发声效率的仪器测量值之间的关系。
前瞻性队列设计。
招募了 15 名成年男性（平均年龄 28.3 岁）和 15 名成年女性（平均年龄 29.2 岁），他们的嗓音质量正常，并对他们的 s/z 比值和仪器气动测量值进行了比较。气动测量值包括肺活量、最长发声时间、持续发声和句子发声时的气流率、声门下压和喉气道阻力。这些测量值是在 Phonatory Aerodynamic System Model 6600 上获得的。统计分析包括单变量方差分析，以检查所有变量在性别之间的差异，以及在三次试验中每个试验的 s/z 比值之间的差异。进行 Pearson 积矩相关分析，以确定 s/z 比值与仪器气动之间任何显著关系的强度和性质。
只有肺活量和最长发声时间这两个测量值在男性和女性之间的平均值存在显著差异。三次试验的 s/z 比值之间没有显著差异。在女性中，s/z 比值与喉气道阻力之间存在显著的中度负相关，而在男性中，s/z 比值与句子气流率之间存在显著的中度负相关。
s/z 比值仅与有限的喉阀仪器测量值有中度相关性。在没有明确证据表明其能够准确评估喉阀的情况下，s/z 比值应与其他喉气动仪器测量值结合使用，以更好地代表气动功能。
