中文摘要：

一个语音的实验被进行调查讲话焦点的声学的特征是否受到讲话层次的影响。六个说话者被指示朗读 32 组试验性的材料。在不同讲话层次的 foci 的持续时间，沥青范围， f0 最大值，和 f0 最小为统计分析被提取。结果表明在讲话层次更高嵌入的 foci 把相对更长的持续时间和更多搭范围扩展；而且与音调联合的变化，在不同讲话层次的 foci 在他们 f0 最大值和 f0 最小特征的表明显著地不同。明确地说，为非低的音调联合，，在更高的讲话层次的 foci 为低音调的联合与更高的 f0 最大值被读，在更高的讲话层次的 foci 与更低的 f0 最小被明白表示。

英文摘要：

A phonetic experiment was conducted to investigate whether the acoustic features of discourse focus were subjected to the influence of discourse hierarchy. Six speakers were instructed to read aloud 32 groups of experimental material. The duration, pitch range, f0 maxima, and f0 minima of foci in different discourse hierarchies were extracted for statistical analysis. The results revealed that foci embedded higher in the discourse hierarchy had relatively longer duration and more expanded pitch range; moreover, with the variation of tone combination, foci in different discourse hierarchies differed remarkably in their manifestation of f0 maxima and f0 minima features. Specifically speaking, for non-low tone combinations, foci in higher discourse hierarchy were pronounced with higher f0 maxima, while for low-tone combinations, foci in higher discourse hierarchy were articulated with lower f0 minima.