Study of vibrant realization by deaf speakers of Brazilian Portuguese

PURPOSE:to investigate in deaf bilingual individuals, the realization of vibrants in stressed syllable-final, in stressed syllable-final or unstressed in the middle of the word, in two language contexts: carrier sentence and letter.METHODS:five deaf bilingual respondents we selected, 4 female and 1 male with severe and / or deep bilateral sensorineural hearing loss, without neurological, cognitive and motor impairment, and two listeners, 01 female and 01 male. The corpus employed was divided into two phases, carrier sentences and letter reading both containing the same words. The recordings were made in the studio at Instituto Nacional de Educação de Surdos. For the analysis of the duration parameter of selected segments (vibrant), broadband spectrograms from the program PRAAT were extracted. Data obtained were statistically treated.RESULTS:the results shown in Table 1 (realization of vibrant in final stressed syllable) and Table 2 (realization of vibrant at the end of the stressed syllable in the middle of the word) show no significant difference at the 5% level, in the time spent for the achievement of vibrant in both groups.CONCLUSION:even though data observed in both investigated groups are not statistically significant at 5%, it is noticed that there is a trend of significant difference when the descriptive level (p value) was between 0.05 and 0.10. In fact, besides the acoustic analysis, the perceptual revealed a trace of vibrant more differentiated in deaf than in the hearing individuals. The findings in this study are related in the literature.

研究目的：探究聋人双语者在两种语言语境（载体句与字母朗读语境）下，颤音（vibrant）在重读音节末尾、单词中间的重读音节末尾及非重读音节位置的实现情况。
研究方法：本研究共招募5名聋人双语被试，其中4名女性、1名男性，均患有双侧重度至极重度感音神经性听力损失，无神经、认知及运动功能障碍；另招募2名听力正常听者，1名女性、1名男性。本次实验所用语料库分为两个实验任务：载体句朗读与字母朗读，二者包含完全一致的目标词汇。录音工作在巴西国家聋人教育研究所（Instituto Nacional de Educação de Surdos）的专业录音棚内完成。为分析目标音段（颤音（vibrant））的时长参数，本研究通过PRAAT软件提取了宽带语谱图。所得全部数据均进行了统计学处理。
研究结果：表1（重读音节末尾位置的颤音实现情况）与表2（单词中间重读音节末尾位置的颤音实现情况）的结果显示，两组被试完成颤音发音所耗费的时长在5%显著性水平下均无统计学显著差异。
结论：尽管两组被试的观测数据在5%显著性水平下未达到统计学显著差异，但可观察到当p值处于0.05至0.10区间时，存在显著性差异的趋势。实际上，除声学分析外，听觉感知结果显示，聋人被试的颤音表现较听力正常个体更为分化。本研究的发现与现有相关文献研究结果相符。