Slavit D H, McCaffrey T V
Department of Otolaryngology, Long Island College Hospital, Brooklyn, New York 11201, USA.
J Voice. 1995 Mar;9(1):86-94. doi: 10.1016/s0892-1997(05)80226-7.
This study introduces a new objective measurement of the vibratory pattern termed the open slope quotient (OSQ). This parameter is based on the maximum slope of the photoglottographic waveform during glottal opening. Using an excised canine larynx model, the electroglottographic and photoglottographic waveforms, sound intensity, and subglottic pressure were recorded as vocal fold tension; glottic width and airflow rate were systematically varied. Multiple regression analysis of the data from nine larynges revealed OSQ to be inversely related to glottic width (p < 0.001) and vocal fold tension (p < 0.001) and directly related to glottic resistance (p < 0.001) and subglottic pressure (p < 0.001). The OSQ was better correlated with glottic width, subglottic pressure, and glottic resistance than speed quotient. OSQ is related to the velocity of vocal fold opening and laryngeal resistance. OSQ may also be related to vocal fold stiffness.
本研究引入了一种新的振动模式客观测量方法，称为开放斜率商（OSQ）。该参数基于声门打开期间光电门波形的最大斜率。使用切除的犬喉模型，记录了电声门图和光电门图波形、声音强度和声门下压力，同时系统地改变声带张力、声门宽度和气流速率。对九个喉部的数据进行多元回归分析后发现，OSQ与声门宽度（p < 0.001）和声带张力（p < 0.001）呈负相关，与声门阻力（p < 0.001）和声门下压力（p < 0.001）呈正相关。与速度商相比，OSQ与声门宽度、声门下压力和声门阻力的相关性更好。OSQ与声带打开速度和喉部阻力有关。OSQ也可能与声带僵硬度有关。
