Accent Intelligibility Differences in Noise Across Native and Nonnative Accents: Effects of Talker-Listener Pairing at Acoustic-Phonetic and Lexical Levels
Accent Intelligibility Differences in Noise Across Native and Nonnative Accents: Effects of Talker-Listener Pairing at Acoustic-Phonetic and Lexical Levels
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DOI：
10.1044/2019_jslhr-s-17-0414
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发表时间：
2019-07-01
影响因子：
2.6
通讯作者：
Iverson, Paul
中科院分区：
文献类型：
--
作者：
Stringer, Louise;Iverson, Paul
目的：口音的可理解性在很大程度上取决于特定的说话者-听者配对。为了探索这种现象的原因，我们调查了声学语音相似性和口音可懂度之间的关系，跨母语（第一语言）和非母语（第二语言）的说话人-听者配对。我们还使用了在线措施，以观察处理的差异，在quiet.Method：英语（n = 16）和西班牙语（n = 16）的听众听到标准的英国南部英语，西班牙英语，西班牙口音的英语在语音识别任务（在安静和噪音）和脑电图任务（安静），旨在评估语音和词汇处理。刺激来自非母语语音识别句子（Stringer & Iverson，2019）。采用ACCDIST（Huckvale，2004，2007）度量标准计算受试者口音与3种口音之间的声学语音相似度。结果：说话者-听者配对对口音可懂度有明显影响。这与说话者和倾听者的语音相似性有关，但相似性不能解释所有的发现。说者-听者配对对词汇加工的影响不太清楚; N400效应主要是强大的口音不匹配，与可理解性的一些关系。结论：这些研究结果表明，说者-听者配对对可理解性的影响可能部分归因于口音相似性，除了口音熟悉。在线测量也表明，即使在口音非常容易理解的情况下，说话者和倾听者口音的差异也会扰乱安静的处理过程。
Purpose: The intelligibility of an accent strongly depends on the specific talker-listener pairing. To explore the causes of this phenomenon, we investigated the relationship between acoustic-phonetic similarity and accent intelligibility across native (1st language) and nonnative (2nd language) talker-listener pairings. We also used online measures to observe processing differences in quiet.Method: English (n = 16) and Spanish (n = 16) listeners heard Standard Southern British English, Glaswegian English, and Spanish-accented English in a speech recognition task (in quiet and noise) and an electroencephalogram task (quiet only) designed to assess phonological and lexical processing. Stimuli were drawn from the nonnative speech recognition sentences (Stringer & Iverson, 2019). The acoustic-phonetic similarity between listeners' accents and the 3 accents was calculated using the ACCDIST metric (Huckvale, 2004, 2007).Results: Talker-listener pairing had a clear influence on accent intelligibility. This was linked to the phonetic similarity of the talkers and the listeners, but similarity could not account for all findings. The influence of talker-listener pairing on lexical processing was less clear; the N400 effect was mostly robust to accent mismatches, with some relationship to intelligibility.Conclusion: These findings suggest that the influence of talker-listener pairing on intelligibility may be partly attributable to accent similarity in addition to accent familiarity. Online measures also show that differences in talker-listener accents can disrupt processing in quiet even where accents are highly intelligible.