Center of Humanities, Department of Modern Languages, State University of Paraíba (Universidade Estadual da Paraíba);
Institute of Language Studies, Department of Linguistics, University of Campinas (Universidade de Campinas).
J Vis Exp. 2024 Sep 27(211). doi: 10.3791/66313.
This research aims to examine both the prosodic-acoustic features and the perceptual correlates of foreign-accented English and foreign-accented Brazilian Portuguese and check how the speakers' productions of foreign and native accents are correlated to the listeners' perception. In the Methodology, we conducted a speech production procedure with a group of American speakers of L2 Brazilian Portuguese and a group of Brazilian speakers of L2 English, and a speech perception procedure in which we performed voice lineups for both languages.For the speech production statistical analysis, we ran Generalized Additive Models to evaluate the effect of the language groups on each class (metric or prosodic-acoustic) of features controlled for the smoothing effect of the covariate(s) of the opposite class. For the speech perception statistical analysis, we ran a Kruskal-Wallis test and a post-hoc Dunn's test to evaluate the effect of the voices of the lineups on the scores judged by the listeners. We nevertheless conducted acoustic (voice) similarity tests based on Cosine and Euclidean distances. Results showed significant acoustic differences between the language groups in terms of variability of the f0, duration, and voice quality. For the lineups, the results indicated that prosodic features of f0, intensity, and voice quality correlated to the listeners' perceived judgments.
本研究旨在探讨非母语英语和非母语巴西葡萄牙语的韵律-声学特征及其感知相关性，并检验说话者的母语和非母语口音的产生与听者感知之间的相关性。在方法部分，我们进行了一项语音产生程序，其中包括一组母语为英语的美国人和一组母语为葡萄牙语的巴西人，以及一项语音感知程序，我们在两种语言中进行了语音辨认。对于语音产生的统计分析，我们运行了广义加性模型，以评估语言群体对每个类别（度量或韵律-声学）特征的影响，同时控制了相反类别的协变量的平滑效应。对于语音感知的统计分析，我们运行了克鲁斯卡尔-沃利斯检验和事后杜恩检验，以评估语音辨认中的声音对听众判断分数的影响。我们还进行了基于余弦和欧几里得距离的声学（语音）相似性测试。结果表明，在 f0 的可变性、时长和语音质量方面，语言群体之间存在显著的声学差异。对于语音辨认，结果表明 f0、强度和语音质量等韵律特征与听众的感知判断相关。
