Nelson W L, Perkell J S, Westbury J R
J Acoust Soc Am. 1984 Mar;75(3):945-51. doi: 10.1121/1.390559.
A previous study of mandible movements in normal speech [W.L. Nelson, J. Acoust. Soc. Am. Suppl. 1 68, S32 (1980)] suggested that the speech motor control process resulted in a relationship between movement time, distance, and peak velocity which implied (1) some adaptation to the physical effort required for the movement, and (2) that the force limit effective during speech was considerably below that which the mandibular muscles are capable of producing. In the present study, mandible movements were measured during maximally rapid opening and closing tasks, and during increasingly rapid repetitions of a spoken syllable and a nonspeech "syllable." The results indicate that (1) peak acceleration levels for the repeated mandible movements were less than half of those for the maximally rapid single mandible movements, and (2) a rather different mode of control is used for the repeated speech movements as compared to the nonspeech movements.
之前一项关于正常言语中下颌运动的研究[W.L. 纳尔逊，《美国声学学会杂志》增刊1 68，S32（1980）]表明，言语运动控制过程导致运动时间、距离和峰值速度之间存在一种关系，这意味着（1）对运动所需的体力有一定的适应性，以及（2）言语过程中有效的力限制远低于下颌肌肉能够产生的力。在本研究中，测量了下颌在最大快速开合任务期间，以及在越来越快速地重复一个语音音节和一个非语音“音节”期间的运动。结果表明：（1）重复下颌运动的峰值加速度水平不到最大快速单次下颌运动峰值加速度水平的一半，以及（2）与非语音运动相比，重复言语运动使用了一种相当不同的控制模式。
