The role of syntax in maintaining the integrity of streams of speech
The role of syntax in maintaining the integrity of streams of speech
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DOI：
10.1121/1.4861354
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发表时间：
2014-02-01
影响因子：
2.4
通讯作者：
Best, Virginia
中科院分区：
文献类型：
--
作者：
Kidd, Gerald, Jr.;Mason, Christine R.;Best, Virginia
这项研究考察了听众利用句法结构从竞争声音中提取目标语音流的能力。目标说话者通过声音或位置来识别，在整个测试话语中保持不变，并与正确或不正确（随机词序）的目标句子语法配对。即使其他特征发生不可预测的变化，语音和位置都可以为识别目标语音提供可靠的线索。目标句子要么被主要的能量掩蔽器（噪声爆发）所掩蔽，要么被主要的信息掩蔽器（随机词序的相似语音）所掩蔽。当掩蔽器是突发噪声时，目标句子语法对识别性能的影响相对较小。然而，当掩蔽者是其他说话者时，正确的目标句子语法比不正确的语法带来明显更好的语音识别性能。此外，仅遵守正确的语法就足以准确识别目标语音。研究结果被解释为支持以下观点：构成语音流的元素的可预测性（如句法结构所示）是将单词结合在一起形成连贯流的重要因素。此外，这些发现表明，在信息掩蔽程度较高的条件下，可预测性对于保持听觉流随时间的一致性特别重要。 (C) 2014 年美国声学学会。
This study examined the ability of listeners to utilize syntactic structure to extract a target stream of speech from among competing sounds. Target talkers were identified by voice or location, which was held constant throughout a test utterance, and paired with correct or incorrect (random word order) target sentence syntax. Both voice and location provided reliable cues for identifying target speech even when other features varied unpredictably. The target sentences were masked either by predominantly energetic maskers (noise bursts) or by predominantly informational maskers (similar speech in random word order). When the maskers were noise bursts, target sentence syntax had relatively minor effects on identification performance. However, when the maskers were other talkers, correct target sentence syntax resulted in significantly better speech identification performance than incorrect syntax. Furthermore, conformance to correct syntax alone was sufficient to accurately identify the target speech. The results were interpreted as supporting the idea that the predictability of the elements comprising streams of speech, as manifested by syntactic structure, is an important factor in binding words together into coherent streams. Furthermore, these findings suggest that predictability is particularly important for maintaining the coherence of an auditory stream over time under conditions high in informational masking. (C) 2014 Acoustical Society of America.