Perception of anticipatory coarticulation effects.
Perception of anticipatory coarticulation effects.
复制标题
预期协同发音效应的感知。
DOI：
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发表时间：
1981
影响因子：
2.4
通讯作者：
H. Bunnell
中科院分区：
文献类型：
--
作者：
J. G. Martin;H. Bunnell
发音和声学研究表明，预期协同发音的影响可能会延伸到话语的几个部分。但以往的知觉研究表明，只有直接相邻的片段所携带的信息才会被用于知觉。为了证明感知并不是那么有限，我们说服了10个说话者每人说出12个句子（例如，“我说poozee”），其形式为“我说/C V1 z V2/”，其中C是/p， t, k/， V1是/u， ae/， V2是/ I， a/。每个/i， a/句子对通过交换最后一个音节/z V2/交叉拼接，因此在交叉句子中，交叉点之前的协同发音信息不适合最后一个元音V2。从练习过的听者那里获得交叉和完整（如口语）句子中V2的识别时间（RT）。结果显示，在交叉句子中，干扰的程度取决于V1和C上下文。另一项实验改变了/C V1/交叉点的位置，发现不适当的预交叉声学的数量和与目标的接近程度直接增加了RT干扰。实验句子的LPC分析表明，F2频率的预靶变化共同依赖于C、V1和V2的同一性。靶前F2变异和C、V1同一性共同预测了交叉句中RT干扰量。最后，对合成语音中的预靶F2变化进行了重复实验，并将实验结果扩展到真实语音中。这些研究得出的结论是，协同发音的感知意义并不局限于对邻近部分的影响。听众似乎对序列中各个片段之间相互影响的许多声学效应很敏感。
Articulatory and acoustic studies have shown that the effects of anticipatory coarticulation may extend across several segments in an utterance. But previous perceptual studies suggest that only the information carried by immediately adjacent segments is used in perception. To show that perception is not so limited, we persuaded ten talkers each to produce 12 sentences (e.g., "I say poozee") of the form "I say /C V1 z V2/" in which C was /p, t, k/, V1 was /u, ae/, and V2 was /i, a/. Each /i, a/ sentence pair was cross spliced by exchanging the final syllable /z V2/ so that coarticulatory information prior to the crosspoint was inappropriate for the final vowel V2 in crossed sentences. Recognition time (RT) for V2 in crossed and intact (as spoken) sentences was obtained from practiced listeners. The results were slower RT in crossed sentences, and amount of interference depended on both V1 and C context. Another experiment varied the location of crosspoints across /C V1/ and found that RT interference increased directly with amount and proximity to target of inappropriate precross acoustics. LPC analysis of the experimental sentences showed pretarget variations in F2 frequency which were jointly dependent on identity of C, V1, and V2. Pretarget F2 variations and C and V1 identity jointly predicted amount of RT interference in crossed sentences. Finally, experiments with pretarget F2 variations in synthetic speech repeated and extended the results with real speech. These studies lead to the conclusion that the perceptual significance of coarticulation is not limited to effects on immediately adjacent segments. Listeners appear to be sensitive to many acoustic effects of the mutual influence among the segments in a sequence.