Direct measurement of onset and offset phonation threshold pressure in normal subjects
Direct measurement of onset and offset phonation threshold pressure in normal subjects
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DOI：
10.1121/1.1812309
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发表时间：
2004-12-01
影响因子：
2.4
通讯作者：
Plant, RE
中科院分区：
文献类型：
--
作者：
Plant, RL;Freed, GL;Plant, RE
对5名正常受试者在不同发声条件下的发声阈值压力进行了直接测量。确定了基频、声带强度、声带闭合速度和喉部呼吸道阻力对发声阈值压力的影响。采用经皮环甲膜穿刺法测量声门下气压。研究了发声的起始和偏移，以了解滞后效应是否产生比起始压力更低的偏移压力。单变量分析表明，发声阈值压力受基频和声强的影响最大。多元线性回归表明，这两个变量以及喉部呼吸道阻力对发声阈值压力的预测作用最强。五名受试者中有两名表现出显著的滞后效应，但有一名受试者的补偿压力实际上高于起始压力。(C)2004年美国声学学会。
Phonation threshold pressures were directly measured in five normal subjects in a variety of voicing conditions. The effects of fundamental frequency, intensity, closure speed of the vocal folds, and laryngeal airway resistance on phonation threshold pressures were determined. Subglottic air pressures were measured using percutaneous puncture of the cricothyroid membrane. Both onset and offset of phonation were studied to see if a hysteresis effect produced lower offset pressures than onset pressures. Univariate analysis showed that phonation threshold pressure was influenced most strongly by fundamental frequency and intensity. Multiple linear regression showed that these two variables, as well as laryngeal airway resistance, most strongly predicted phonation threshold pressure. Two of the five subjects demonstrated a significant hysteresis effect, but one subject actually had higher offset pressures than onset pressures. (C) 2004 Acoustical Society of America.