Orlikoff R F, Baken R J
Department of Speech and Language Pathology and Audiology, Teachers College, Columbia University, New York, New York 10027-6696.
J Acoust Soc Am. 1989 Feb;85(2):888-93. doi: 10.1121/1.397560.
Signal-averaging techniques reveal that the vocal fundamental frequency (F0) of a sustained vowel is modulated over a period equal to that of the speaker's heart cycle. Average F0 deviation varies in an orderly way from about 0.5% to about 1.0% as F0 changes. Location of the peak deviation in the time frame of the heart cycle also changes systematically with vocal F0. Modulation of the vocal F0 is likely to be caused by pressure-related changes in the stiffness of the vascular bed of the vocal folds and by alterations of the geometry of the thyroarytenoid muscle produced by periodic vascular engorgement.
信号平均技术显示，持续元音的语音基频（F0）在与说话者心动周期相等的时间段内受到调制。随着F0的变化，平均F0偏差以有序的方式从约0.5%变化到约1.0%。心动周期时间框架内峰值偏差的位置也随语音F0而系统地变化。语音F0的调制可能是由声带血管床硬度的压力相关变化以及周期性血管充血引起的甲状杓肌几何形状改变所导致的。
