The elastic phrase: modeling the dynamics of boundary-adjacent lengthening
The elastic phrase: modeling the dynamics of boundary-adjacent lengthening
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DOI：
10.1016/s0095-4470(02)00085-2
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发表时间：
2003-04-01
影响因子：
1.9
通讯作者：
Saltzman, E
中科院分区：
文献类型：
--
作者：
Byrd, D;Saltzman, E
本文研究了言语产生的动态系统模型中，短语结构与发音的控制和协调之间的关系。在这种情况下，我们回顾了发言者如何调制的发音手势的时空组织作为他们的短语位置的功能。我们目前的计算模拟，捕捉这些短语边界效应，如韵律引起的局部放缓的几个重要的定性性质。这种减慢是由发音手势的激活时程上的动力学效应产生的，并且由韵律手势或π手势控制，这与收缩手势的熟悉的动力学描述有很多共同之处。然而，韵律手势在边界处的功能纯粹是暂时拉伸或收缩手势激活轨迹。这种对“时钟速率”的调制控制着连接点附近话语的时间展开，使得时钟随着边界的接近而逐渐变慢，并且随着边界的后退而再次加速。将短语边界视为话语的时间结构的扭曲，代表了韵律学和言语动力学领域的一个有希望的融合。(C)2003爱思唯尔科技有限公司版权所有。
This work examines the relation between phrasal structure and the control and coordination of articulation within a dynamical systems model of speech production. In this context, we review how speakers modulate the spatiotemporal organization of articulatory gestures as a function of their phrasal position. We present computational simulations that capture several important qualitative properties of these phrase boundary effects, such as prosodically-induced local slowing. This slowing is generated by dynamical effects on the activation timecourse of articulatory gestures and is controlled by prosodic gestures or pi-gestures, which share much with the familiar dynamical description of constriction gestures. Prosodic gestures, however, function at boundaries purely to temporally stretch or shrink gestural activation trajectories. This modulation of the "clock-rate" that controls the temporal unfolding of an utterance near junctures is such that the clock slows increasingly as the boundary is approached and speeds up again as the boundary recedes. Viewing phrase boundaries as warping the temporal fabric of an utterance represents a promising confluence of the fields of prosody and of speech dynamics. (C) 2003 Elsevier Science Ltd. All rights reserved.