Huber Jessica E, Stathopoulos Elaine T
Department of Audiology and Speech Sciences, Purdue University, West Lafayette, IN 47907-2038, USA.
J Speech Lang Hear Res. 2003 Oct;46(5):1207-20. doi: 10.1044/1092-4388(2003/094).
Researchers have hypothesized that the respiratory and laryngeal speech subsystems would respond to an air pressure bleed, but these responses have not been empirically studied. The present study examined the nature of the responses of the respiratory and laryngeal subsystems to an air pressure bleed in order to provide information relevant to the nature of motor control for speech. Participants produced a syllable train consisting of 7 syllables of [pa] 10 times with and without an air pressure bleed in place. Acoustic, aerodynamic, and respiratory kinematic data were collected. In the bleed condition, peak intraoral air pressure and average oral airflow during the [a] were lower, lung and rib cage volume excursions were longer, and rib cage volume terminations were more negative. This study provides empirical data demonstrating a clear interaction among the speech subsystems. Both active and passive mechanisms are suggested by the subsystems' responses.
研究人员推测，呼吸和喉部言语子系统会对气压泄漏做出反应，但这些反应尚未得到实证研究。本研究考察了呼吸和喉部子系统对气压泄漏的反应性质，以便提供与言语运动控制性质相关的信息。参与者在有和没有气压泄漏的情况下，各进行10次由7个[pa]音节组成的音节串发音。收集了声学、空气动力学和呼吸运动学数据。在有气压泄漏的情况下，[a]音期间的口腔内峰值气压和平均口腔气流较低，肺和胸廓容积变化更长，胸廓容积终止时更负。本研究提供了实证数据，证明了言语子系统之间存在明显的相互作用。子系统的反应表明了主动和被动机制。
