中文摘要：

包括子句，简单句子，复合句子和段，讲话单位的声学、知觉的特征被学习。声学的特征基于一个讲话语料库的分析由十独白组成了。独白的察觉的边界力量(PBS ) 被 25 个参加者在五点的规模上标记。主要结果如下：(1 ) 在子句的 PBS 有重要差别(相应于 intonational 短语) ，句子(包括的简单句子和复合句子) 和段。但是简单句子和复合句子的 PBS 是一样，并且重设并且暂停的沥青也不在这些二种边界之间是显著地不同的。(2 ) 过去常区分子句，句子和段的基于沥青的暗示看起来是边界前和边界以后的音节之间的差别，然而并非简单地也的沥青价值音节独自一个。(3 ) 偏斜主要发生在 intonational 短语以内，而在句子或在段没有一致全球偏斜。(4 ) 暂停更长并且更在更大的讲话单位的边界被改变。而且，在之间有重要积极关联暂停沥青的持续时间和度在子句边界，然而并非在句子或段边界重设。

英文摘要：

The acoustic and perceptive characteristics of discourse units, including clauses, simple sentences, compound sentences and paragraphs, were studied. The acoustic characteristics were based on the analysis of a speech corpus consisted of ten monologues. The Perceived Boundary Strength （PBS） of the monologues was labeled on a five-point scale by 25 partici- pants. The main results are as follows： （1） There is a significant difference in the PBS of clauses （corresponding to intonational phrase）, sentences （including simple sentences and compound sentences） and paragraphs. But the PBS of simple sentences and compound sentences is the same, and the pitch reset and pause are also not significantly different between these two kinds of boundaries. （2） The pitch-based cue used to distinguish clauses, sentences and paragraphs appears to be the difference between pre- and post-boundary syllables, but not simply the pitch value of either syllable alone. （3） Declination mainly occurs within intonational phrases, whereas there is no consistent global declination in sentences or in paragraphs. （4） Pauses are longer and more varied at the boundary of larger discourse units. Moreover, there is a significant positive correlation between pause duration and degree of pitch reset at clause boundaries, but not at sentence or paragraph boundaries.