Tanaka K, Kitajima K, Kataoka H, Kataoka K, Tanaka H
Department of Otolaryngology, Shiga University of Medical Science, Otsu.
Nihon Jibiinkoka Gakkai Kaiho. 1997 Jan;100(1):1-6. doi: 10.3950/jibiinkoka.100.1.
We have described the influence (dF/dP) of transglottal pressure on vocal fundamental frequency (F0). It was previously reported that dF/dP varied with the stiffness of the vocal folds, and that the vocal fold membrane when dry was stiffer than when wet. Normal subjects were injected with atropine sulfate in order to dry their larynx, as a model of stiffer-than-normal vocal folds. Transglottal pressure changes during sustained phonation were applied by partially closing a shutter valve mounted on a mouthpiece. Both before and after atropine sulfate injection, the values of dF/dP, in modal register, decreased and increased as F0 increased, and the smallest values of dF/dP were negative in all subjects. The absolute values of both the largest and smallest dF/dP in subjects with atropine sulfate were smaller than those in normal subjects. These finding indicated that dF/dP is correlated with the stiffness of the vocal folds.
我们已经描述了声门跨压对嗓音基频（F0）的影响（dF/dP）。此前有报道称，dF/dP随声带的硬度而变化，并且声带膜干燥时比湿润时更硬。为了模拟比正常声带更硬的情况，给正常受试者注射硫酸阿托品以使其喉部干燥。在持续发声过程中，通过部分关闭安装在吹口上的快门阀来施加声门跨压变化。在注射硫酸阿托品前后，在模态音域中，dF/dP的值均随着F0的增加而减小和增加，并且所有受试者中dF/dP的最小值均为负值。注射硫酸阿托品的受试者中dF/dP的最大值和最小值的绝对值均小于正常受试者。这些发现表明dF/dP与声带的硬度相关。
