论声调语言的节奏与重音模式

声调语言的重音及其实现方式一直存在广泛争议，节奏角度可以为此问题带来新的研究思路。nPVI节奏模型主要反映相邻音节时长变化，作为声调语言，成都话的nPVI明显高于普通话，接近被视为重音计时型语言的英语，这与其重音凸显方式密切相关。成都话双音词和三音词的首音节大都具有时长重音，信息焦点也主要依靠时长凸显，有时还辅以焦点前压缩和助词延展。重音可以和声调共存，变调规律有时与重音实现直接相关，声调语言的节奏特征可以反映该语言中重音的作用大小和凸显度差异。

On the Speech Rhythm and Stress Pattern of Tone Languages

Although the use of rhythm metrics in evaluating rhythm class hypothesis is debated nPVI can effectively reflect rhythm difference when applying to closely related languages and several methods can further improve the robustness. The current study shows that Chengdu Mandarin as a tone language has a much larger nPVI than standard Mandarin and is closer to typical stress-timed languages like English. The rhythm pattern is corroborated by the salience of stress in Chengdu Mandarin. Most disyllabic and trisyllabic words carry word-initial stress marked by lengthened duration. Informational focus is also realized through durational change along with pre-focus compression and lengthening on paricles. The acoustic properties of tones and tone-sandhi patterns are also closely associated with the realization of stress. The study of rhythm can therefore shed new light on the long-debating question of the occurence of lexical stress in tone languages.