Engstrand O
University of Uppsala, Department of Linguistics, Sweden.
J Acoust Soc Am. 1988 May;83(5):1863-75. doi: 10.1121/1.396522.
Articulatory activity underlying changes in stress and speaking rate was studied by means of x-ray cinefilm and acoustic speech records. Two Swedish subjects produced vowel-consonant-vowel (VCV) utterances under controlled rate-stress conditions. The vowels were tense (i a u), and the consonants were the voiceless stops, notably (p). The spectral characteristics of the vowels were not significantly influenced by changes in the speaking rate. They were, however, significantly emphasized under stress. At the articulatory level, stressed vowels displayed narrower oral tract constrictions than unstressed vowels at the two speaking rates studied. At the faster speaking rate, vowel- and consonant-related gestures were coproduced to a greater extent than at the slower rate. The data, failing to produce evidence for an "undershoot" mechanism, support the view that dialect-specific correlates of stress are actively safeguarded by means of articulatory reorganization.
通过X射线电影胶片和声言语记录研究了重音和语速变化背后的发音活动。两名瑞典受试者在可控的语速-重音条件下发出元音-辅音-元音（VCV）话语。元音为紧元音（i、a、u），辅音为清塞音，特别是（p）。元音的频谱特征不受语速变化的显著影响。然而，在重音下它们会被显著强化。在发音层面，在所研究的两种语速下，重音元音的口腔通道收缩比非重音元音更窄。在较快的语速下，与元音和辅音相关的手势比在较慢语速下更多地同时产生。这些数据未能提供“ undershoot”机制的证据，支持了这样一种观点，即通过发音重组积极维护重音的方言特定相关性。
