轻微还是强烈？成人语后聋人工耳蜗植入者对非母语口音的感知。

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中文摘要

目的： 本研究旨在考察成人人工耳蜗（CI）使用者对说话者口音程度的感知，以及音段和超音段特征与CI使用者口音评分之间的相关性。
方法： 招募了20名以英语为母语、语后聋的成人CI使用者参加口音评分任务。语音材料是从12名带有普通话口音的英语说话者和2名英语母语说话者朗读的《彩虹段落》中切分出的句子。每位听者采用9点量表对说话者的口音进行评分。分析了14项音段和超音段特征，包括元音距离、发音和音系错误的发生、发音速率、停顿次数、强度变化模式、平均F0范围和F0变化模式，并将其纳入线性混合效应模型（LMM），以考察其与听者评分的关系。将CI听者的评分数据与我们先前研究中报告的NH听者数据进行比较。
结果： 尽管语后聋成人CI使用者总体上对带有外国口音的说话者评分低于NH听者，但他们区分说话者口音强度的方式与NH听者相似。LMM显示，CI听者的口音评分与广泛的声学-语音相关因素有关，包括语音样本的音段和超音段特征，而NH听者的评分主要与说话者的音段特征和发音速率相关。
结论： 语后聋成人CI使用者能够区分非母语口音的强度，且音段和超音段特征在其口音程度判断中均发挥作用。

英文摘要

OBJECTIVES: The purpose of this study was to examine the perception of speaker accentedness by adult CI users and the relevance of segmental and suprasegmental features to CI users' accentedness rating.
METHODS: Twenty native-English speaking, postlingually deafened adult CI users were recruited for an accent rating task. The speech materials were sentences segmented from the 'The Rainbow Passage' produced by 12 Mandarin-accented English speakers and 2 native English speakers. Each listener rated the speakers' accents on a 9-point scale. The 14 ' segmental and suprasegmental features, including vowel distance, occurrence of articulation and phonological errors, articulation rate, number of pauses, intensity change pattern, average F0 range, and F0 change pattern, were analyzed and used in a linear mixed-effects model (LMM) to examine their relationship with the listeners' rating scores. The CI listeners' rating data were compared with those of NH listeners reported in our previous study.
RESULTS: Although the postlingually deafened adult CI users generally rated foreign-accented speakers with lower scores than the NH listeners did, they differentiated speakers' accent strength in a manner similar to that of the NH listeners. The LMM revealed that the CI listeners' accent rating was related to a wide range of acoustic-phonetic correlates, including both segmental and suprasegmental features of the speech samples, while the NH listeners' rating was mainly associated with speakers' segmental features and the articulation rate.
CONCLUSION: Postlingually deafened adult CI users are able to differentiate the strength of non-native accents, and both segmental and suprasegmental features play a role in their accentedness judgments.