Parush A, Ostry D J
Tel Aviv University, Israel.
J Acoust Soc Am. 1993 Aug;94(2 Pt 1):715-22. doi: 10.1121/1.406888.
Speech movements of the lower pharyngeal wall were recorded in two subjects using pulsed-echo ultrasound. The focus of the study was the pattern of coarticulation of pharyngeal wall movements. Using nonsense utterances as test material, both anticipatory and carryover coarticulatory effects were observed. The identity of the final vowel in VCV sequences affected the kinematic characteristics of the initial VC transition. Both the amplitude and the duration of the movement between the initial vowel and the consonant were greater when the final vowel was /u/ rather than /a/. Similarly, the initial vowel affected the kinematic characteristics of the final CV transition. The amplitude of the movement from the consonant to the final vowel was greater with the initial vowel /u/ as opposed to /a/. The coarticulatory patterns observed in this study are similar to those previously reported for the tongue dorsum and upper pharynx [Parush et al., J. Acoust. Soc. Am. 74, 1115-1125 (1983); Parush and Ostry, J. Acoust. Soc. Am. 80, 749-756 (1986)].
使用脉冲回波超声记录了两名受试者下咽壁的语音运动。该研究的重点是下咽壁运动的协同发音模式。以无意义话语作为测试材料，观察到了预期协同发音效应和滞后协同发音效应。VCV序列中最后一个元音的特性影响了初始VC过渡的运动学特征。当最后一个元音为/u/而非/a/时，初始元音与辅音之间运动的幅度和持续时间都更大。同样，初始元音也影响了最终CV过渡的运动学特征。与初始元音/a/相比，初始元音/u/时从辅音到最后一个元音的运动幅度更大。本研究中观察到的协同发音模式与先前报道的舌背和上咽部的协同发音模式相似[帕鲁什等人，《美国声学学会杂志》74, 1115 - 1125 (1983); 帕鲁什和奥斯特里，《美国声学学会杂志》80, 749 - 756 (1986)]。
