Acoustic properties of vowel production in prelingually deafened Mandarin-speaking children with cochlear implants.
Acoustic properties of vowel production in prelingually deafened Mandarin-speaking children with cochlear implants.
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DOI：
10.1121/1.4932165
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Jing Yang;E. Brown;R. Fox;Li Xu
中科院分区：
文献类型：
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作者：
Jing Yang;E. Brown;R. Fox;Li Xu
本研究旨在探讨人工耳蜗植入后普通话儿童元音发音的声学特征。受试者包括14名母语为普通话、语前听力正常的CI儿童（2.9-8.3岁）和60名年龄匹配的听力正常（NH）儿童（3.1-9.0岁）。每个受试者产生一个包含七个普通话元音的单音节列表：[i，a，u，y，，，]。每个元音标记的中点F1和F2被提取和归一化，以消除不同声道大小的影响。结果表明，CI儿童比NH儿童发出的元音明显更长，元音类别更少。CI儿童的声学元音空间减少是由于元音[i]的回缩产生。元音间隙面积与植入年龄呈显著负相关（r = -0.80）。声学距离的分析表明，CI儿童产生的角元音[a，u]与NH儿童相似，但其他元音（例如，[，]）与NH儿童不同，这表明CI儿童一般遵循与NH儿童相似的元音习得发展路径。这些发现强调了早期植入的重要性，并对患有CI的幼儿的临床听力障碍有影响。
The present study examined the acoustic features of vowel production in Mandarin-speaking children with cochlear implants (CIs). The subjects included 14 native Mandarin-speaking, prelingually deafened children with CIs (2.9-8.3 yr old) and 60 age-matched, normal-hearing (NH) children (3.1-9.0 years old). Each subject produced a list of monosyllables containing seven Mandarin vowels: [i, a, u, y, ɤ, ʅ, ɿ]. Midpoint F1 and F2 of each vowel token were extracted and normalized to eliminate the effects of different vocal tract sizes. Results showed that the CI children produced significantly longer vowels and less compact vowel categories than the NH children did. The CI children's acoustic vowel space was reduced due to a retracted production of the vowel [i]. The vowel space area showed a strong negative correlation with age at implantation (r = -0.80). The analysis of acoustic distance showed that the CI children produced corner vowels [a, u] similarly to the NH children, but other vowels (e.g., [ʅ, ɿ]) differently from the NH children, which suggests that CI children generally follow a similar developmental path of vowel acquisition as NH children. These findings highlight the importance of early implantation and have implications in clinical aural habilitation in young children with CIs.