The objective of this study was to determine the relationship between lung volume (LV) conditions and vocal fold vibratory patterns using measurements of closed quotient (CQ), fundamental frequency (F₀) and relative vocal intensity. Forty-three healthy and vocally untrained females were asked to produce the vowel /a/ following breathing instructions that cued for higher, habitual, or lower LV conditions. Closed quotient was measured by electroglottography (EGG) and analyzed using criterion-level method of 25%. An average of CQ, F₀ and relative vocal intensity were obtained. No significant difference was observed in CQ between cued LV conditions; however, there was a trend for CQ to increase in the cued high LV condition. Relative vocal intensity and F₀ differed significantly across all conditions with higher F₀ and relative vocal intensity observed at the high LV condition. These findings suggested that the use of different cued LVs did not have a significant impact on CQ. This may have been due to (1) the phonatory task, (2) variability in responses to the breathing instructions between individuals, and (3) the measurement of CQ. However, F₀ and relative vocal intensity were significantly influenced by the LV. This offers a possible alternative approach in cueing pitch and loudness in singing and voice therapy.

中文翻译：

---

不同肺部容积条件对未经训练的女性说话者的封闭商，人声基本频率和相对强度的影响

这项研究的目的是通过测量封闭商（CQ），基频（F ₀）和相对声音强度来确定肺容量（LV）条件与人声折叠振动模式之间的关系。要求43名健康且未经声音训练的女性按照指示较高，习惯或较低LV状况的呼吸指示制作元音/ a /。封闭商通过电渗色法（EGG）进行测量，并使用25％的标准级方法进行分析。获得CQ，F ₀和相对声音强度的平均值。在提示的LV条件之间，CQ没有观察到显着差异。但是，在提示的高LV条件下，CQ有增加的趋势。相对声音强度和在所有条件下，F _0均存在显着差异，在较高的LV条件下，F ₀和相对声音强度更高。这些发现表明，使用不同提示的左心室对CQ没有明显影响。这可能是由于（1）发声任务，（2）个人之间对呼吸指令的响应变化以及（3）CQ的测量。然而，LV显着影响F ₀和相对声音强度。这为提示唱歌和语音治疗中的音高和响度提供了一种可能的替代方法。