Moon J B, Folkins J W
Department of Speech Pathology and Audiology, Wendell Johnson Speech and Hearing Center, University of Iowa, Iowa City 52242.
J Acoust Soc Am. 1991 Dec;90(6):2992-9. doi: 10.1121/1.401773.
Previous experimental evidence has been interpreted as support for regulation of both acoustics and aerodynamics during speech production. One recent perspective is that although speech acoustics may be manipulated, regulation of aerodynamics is a central component of the processes that produce speech. From this perspective, it has been suggested that aerodynamic regulation is given priority over perceptual accuracy. The experiment attempted to test this hypothesis by forcing speakers into a choice between aerodynamic and acoustic regulation. The intensity level of frication (embedded in a carrier phrase) was selectively amplified or attenuated and fed back to the speaker on line. Intraoral air pressure was recorded in order to assess whether or not perturbed auditory feedback would result in aerodynamic compensation. Although compensatory changes in peak intraoral air pressure, pressure duration, and pressure curve area were seen in response to 30-dB alterations of frication, no systematic effects were seen for smaller auditory manipulations. Further, the compensations were less than what one might expect from a system controlling auditory output. Explanations of these findings and their implications for the control of speech production are offered.
先前的实验证据被解释为支持在言语产生过程中对声学和空气动力学进行调节。最近的一种观点是，虽然言语声学可以被操控，但空气动力学调节是产生言语过程的核心组成部分。从这个角度来看，有人认为空气动力学调节优先于感知准确性。该实验试图通过迫使说话者在空气动力学调节和声学调节之间做出选择来检验这一假设。摩擦音（嵌入在一个载体短语中）的强度水平被选择性地放大或衰减，并在线反馈给说话者。记录口腔内气压，以评估受干扰的听觉反馈是否会导致空气动力学补偿。尽管在摩擦音强度改变30分贝时，观察到口腔内气压峰值、压力持续时间和压力曲线面积的补偿性变化，但对于较小的听觉操控，未观察到系统性影响。此外，这些补偿小于控制系统听觉输出所预期的补偿。文中提供了对这些发现的解释及其对言语产生控制的意义。
