Humming Facilitates a Gradual Increase in Vocal Intensity by Alleviating the Enhancement of Vocal Fold Contact and Supraglottic Constriction
Humming Facilitates a Gradual Increase in Vocal Intensity by Alleviating the Enhancement of Vocal Fold Contact and Supraglottic Constriction
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DOI：
10.1016/j.jvoice.2019.05.004
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发表时间：
2021-01-13
期刊：
影响因子：
2.2
通讯作者：
Inohara, Hidenori
中科院分区：
文献类型：
--
作者：
de Hoop, Tom;Ogawa, Makoto;Inohara, Hidenori
目标。本研究旨在评估嗡嗡声是否能在仅轻微增加声门接触和声门上压迫的情况下逐渐增加声音强度。17名健康的无发音障碍的说话者被要求按顺序完成两项发音任务：在持续发元音或发出嗡嗡声（分别为元音或嗡嗡声-渐强任务：VCT或HCT）时逐渐增加声音的音量（渐强），同时记录声压级（SPL）、电声门图（EGG）信号和高速喉部电影。计算了EGG信号的声门接触参数、声门开、喉出口参数以及声门在喉片上短暂关闭的持续时间。在两项任务中，随着声压级的逐渐增加，大多数参与者的声门接触逐渐减少，但EGG的声门接触没有明显的变化。在任务间的比较中，HCT比VCT产生更低的声压级，更大的喉出口参数值和更短的发音前瞬态声门关闭时间。任务间由于SPL突增而导致任务执行失败的比例差异显著（VCT和HCT分别为41%和6%，P = 0.011），且失败的VCT的EGG接触参数值显著高于成功的VCT。这些结果表明，在声音强度逐渐增加的过程中，嗡嗡声减轻了声门接触和声门上压迫的增强，从而防止了声音强度突然增加而不是足够的声音输出。
Objectives. This study aimed to assess whether or not humming can help increase vocal intensity gradually with only a slight increase in the glottal contact and supraglottic compression.Methods. Seventeen healthy nondysphonic speakers were asked to perform two phonatory tasks in order: gradually increasing vocal loudness (crescendo) during sustained phonation of a vowel or production of a hum (vowel- or humming-crescendo task: VCT or HCT, respectively), while the sound pressure levels (SPL), electro-glottographic (EGG) signals and high-speed laryngeal movies were simultaneously recorded. The glottal contact parameter of the EGG signals and the glottal opening and laryngeal outlet parameters as well as the duration of prephonatory transient glottal closure on the laryngeal movies were calculated.Results. With a gradual SPL increase during both tasks, most participants showed a progressive decrease in the LO, but no discernible change in the EGG glottal contact. In comparisons between tasks, an HCT produced a significantly lower SPL, greater laryngeal outlet parameter value and shorter prephonatory transient glottal closure duration than a VCT. A significant difference between tasks was found in the proportion of failed task performance due to an abrupt SPL increase (41% and 6% in VCT and HCT, respectively; P = 0.011), and the failed VCTs showed a significantly higher EGG contact parameter value than the successful VCTs.Conclusion. These results demonstrate that during an gradual increase in vocal intensity, humming alleviates the enhancement in both the glottal contact and supraglottic compression, leading to the prevention of an abrupt increase in vocal intensity instead of adequate vocal output.