Perception of Segment Duration in Sentence Contexts
Perception of Segment Duration in Sentence Contexts
复制标题
句子上下文中片段持续时间的感知
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
W. Cooper
中科院分区：
文献类型：
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作者：
D. Klatt;W. Cooper
一个类别判断技术已被用来量化的语音段放置在不同的句法环境中的话的首选持续时间。句子包含强调元音Iii的v字“交易”和postvocalic摩擦lsi的字“鱼”被修改删除或复制部分的波形从语音段的问题。结果表明，听众调整他们的期望段持续时间取决于句子中的单词的句法位置。特别是，在短语最后音节的产生中看到的音段延长在听者的感知方案中表示。在一组随机的不同句子中，进一步检查数据，以确定单个片段持续时间变化的最小可察觉差异（JND）。发现JND为25 msec或更长。句子环境之间的JND差异表明了对持续时间信息感知的以下限制：（a）对持续时间变化的敏感性最适合非单词结尾音节中的语音片段，（B）敏感性受任何后续单词的后向掩蔽效应的影响，以及（c）话语结尾摩擦音的偏移时间特别难以感知。
A category judgment technique has been used to quantify the preferred duration for phonetic segments in words placed in different syntactic environments. Sentences containing the stressed vowel Iii of v the word "deal" and the postvocalic fricative lsi of the word "fish" were modified by deleting or duplicating portions of the waveform from the phonetic segment in question. Results indicate that listeners adjust their expectations of segment duration depending on the syntactic position of the word in the sentence. In particular, the segmental lengthening that is seen in the production of a phrase-final syllable is represented in a listener's perceptual scheme. The data were further examined in order to determine the just-noticeable difference (JND) for a change in duration to a single segment, in a randomized set of different sentences. The JND was found to be 25 msec or more. JND differences between sentence environments suggest the following constraints on the perception of durational information: (a) sensitivity to changes in duration is best for phonetic segments in non-word-final syllables, (b) sensitivity is influenced by a backward masking effect of any following words, and (c) the offset time of an utterance-final fricative is particularly difficult to perceive.