Richardson L M, Busby P A, Blamey P J, Dowell R C, Clark G M
Ear Hear. 1993 Oct;14(5):339-49. doi: 10.1097/00003446-199310000-00005.
Cochlear implants provide an auditory signal with which profoundly deaf users may monitor their own speech production. The vowel production of two adults and three children who used the Nucleus multiple-electrode cochlear implant was examined to assess the effect of altered auditory feedback. Productions of words were recorded under conditions where the talkers received auditory feedback (speech processor turned on) and where no auditory feedback was provided (speech processor turned off). Data were collected over 3 days at weekly intervals. First and second formant frequencies were measured and the data were analysed to assess significant differences between auditory feedback conditions, vowel context, and data collection points. Overall, the results varied across talkers, across the data collection days, and depended on the consonant environment of the vowel. However, two effects of auditory feedback were noted. First, there was a generalized shift in first formant frequencies between the processor on and processor off conditions across three of the five subjects, but the shift differed in direction for each subject. Second, for three of the five talkers, the two front vowels /epsilon/ and /i/ were more neutralised in the absence of auditory feedback. However, this effect was less pronounced than that noted by previous studies.
人工耳蜗能为极重度聋的使用者提供听觉信号，以便他们监测自己的言语发音。研究了两名成人和三名使用Nucleus多电极人工耳蜗的儿童的元音发音，以评估改变听觉反馈的影响。在受试者接收到听觉反馈（言语处理器开启）和未提供听觉反馈（言语处理器关闭）的条件下，记录单词的发音。数据在3天内每周收集一次。测量了第一和第二共振峰频率，并对数据进行分析，以评估听觉反馈条件、元音语境和数据收集点之间的显著差异。总体而言，结果因受试者、数据收集日而异，并且取决于元音的辅音环境。然而，注意到了听觉反馈的两种效应。首先，五名受试者中有三名在言语处理器开启和关闭条件之间，第一共振峰频率出现了普遍偏移，但每个受试者的偏移方向不同。其次，对于五名受试者中的三名，在没有听觉反馈的情况下，两个前元音/ε/和/i/的发音更加趋于中性。然而，这种效应不如先前研究所指出的那么明显。
