Intragestural dynamics of multiple prosodic boundaries
Intragestural dynamics of multiple prosodic boundaries
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DOI：
10.1006/jpho.1998.0071
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发表时间：
1998-04-01
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
最近的工作表明，发音手势的时间延长相邻的语调短语边界可以被解释为从一个较低的潜在的手势刚度。来自三个主题的磁力计数据进行了检查，以确定是否可以区分多个层次的韵律边界的时空模式的清晰度，以及这些模式是否与降低姿态刚度帐户一致。80令牌记录的/CVCV # CVCV/序列与五个不同的边界条件，旨在引起多个韵律边界。每个辅音关闭和打开手势的幅度和持续时间，以及辅音之间的时间潜伏期。在发音的/CV # CV/部分中的三个水平的辅音间潜伏期可以在统计上区分。这些差异是由于边界后关闭运动的延长以及边界前开放运动的延长（在较小程度上）造成的。伴随的空间变化进行了讨论。运动学数据被用来模拟边界相邻延长的手势内动力学。这个模型表明，虽然降低手势刚度是延长的主要来源，另一个参数-上升时间手势激活-也是必要的。扬声器特定的动态差异占上升时间随刚度变化的方式相应的差异。(C)出版社：Academic Press Limited。
Recent work has demonstrated that temporal lengthening of articulatory gestures adjacent to an intonational phrase boundary can be interpreted as resulting from a lower underlying gestural stiffness. Magnetometer data from three subjects were examined to determine whether multiple levels of prosodic boundaries can be distinguished in the spatio-temporal patterning of articulation and whether these patterns are consistent with the lowered gestural stiffness account. Eighty tokens were recorded of a /CVCV # CVCV/ sequence with five differing boundary conditions intended to elicit multiple prosodic boundaries. Magnitude and duration of each consonantal closing and opening gesture, and the temporal latency between consonants were determined. Three levels of interconsonant latency in the /CV # CV/ portion of the utterance can be statistically differentiated. These differences result from lengthening of postboundary closing movements and, to a lesser extent, the preboundary opening movements. Concomitant spatial changes are discussed. The kinematic data are used to model the intragestural dynamics of boundary-adjacent lengthening. This modeling suggests that although lowered gestural stiffness is the main source of lengthening, another parameter-a rise-time for gestural activation-is also necessary. Speaker-specific differences in dynamics are accounted for by corresponding differences in the manner in which rise-time varies with stiffness. (C) 1998 Academic Press Limited.