汉语韵律层级结构边界的声学分析

基于大规模语料库,对比了较慢和较快两种语速的语料,研究了韵律层级结构边界的声学表现。研究主要得到以下结果: (1)汉语语句音高的下倾和重置是由音域下限的移动实现的。 (2)韵律词边界的声学线索是低音线的不连续性和边界前音节的延长, 一般没有无声段。 (3)韵律短语和语调短语边界的声学线索是低音线重置和无声段。并且,边界等级越高,低音线重置程度越大,无声段的长度也越长。 (4)知觉等级与无声段长度成对数增长关系。

Acoustic analysis on prosodic hierarchical boundaries of Chinese

Based on large corpus with both low and fast speed, we investigated acoustic correlates to prosodic hierarchical boundaries in Chinese. The main results are:(1) The declination of intonation in Chinese is realized by the bottom line which is composed of low points of the pitch. (2) The acoustics correlates of prosodic word boundary are pre-boundary lengthening and discontinuation of the bottom line of intonation. (3) The acoustics correlates of prosodic phrase and intonational phrase are pitch reset of bottom line of intonation and insertion of silence. Moreover, the higher the prosodic boundary is, the higher the extent of pitch reset is and the longer the silence is. There is no significant difference on pre-boundary lengthening between syllables on these two prosodic boundaries. (4) There is logarithm correlates between perceived boundary strength and length of silence.