普通话单双音节声母唇形协同发音研究

Lip Coarticulation of Initials in Monosyllables and Disyllables in Mandarin Chinese

本文对汉语普通话单双音节声母起始位置的唇形在不同环境下的协同发音现象进行研究,结果发现:单音节中后接圆唇元音对声母产生的逆向协同发音影响是显著的,使唇高度、宽度、下颌高度等关键参数显著降低;u做主元音时相比介音u能使前置辅音达到更圆唇的协同发音动作,i和ü没有这样的效应;汉语普通话的卷舌声母唇形在协同发音中更倾向于保持自身较开的唇形,抵消下颌的闭合和后接圆唇元音的协同发音作用;卷舌韵母有类似的特性,并可以在协同发音中对后音节的声母产生增大唇开度、减小唇宽度的作用;协同发音中唇形与下颌的互动在不同环境下可能产生一致或不一致的运动;圆唇元音对后音节起始辅音的顺向协同发音作用使非唇音声母的唇宽度显著减小,并使唇高度分布更加聚集。

This paper studied the coarticulation of the lip gesture in initials of Mandarin monosyllables and disyllables in different contexts.It was found that rounded vowels have significant regressive coarticulatory effect on preceding initials,leading to lower lip width,height and jaw opening.Also,/u/in the syllable nucleus caused the preceding initials to have more round lip gestures than the prenuclear/u/,and such an effect was not found in the case of/i/and/ü/in both prenuclear and nuclear positions.Retroflex initials tended to keep their lip shapes more open,offsetting the lip rounding and jaw closing coarticulatory effect triggered by the following rounded vowels.Retroflex vowels showed similar effects,rendering the initials in the following syllables in an articulatory configuration with lips more open but narrower in width.Jaw and lips may be subject to consistent or inconsistent coarticulatory effects in different contexts.Rounded vowels may have significant progressive coarticulatory effect on the initials of the following syllables,decreasing the lip width and making the lip height in aggregated distribution.