Mandarin compound vowels produced by prelingually deafened children with cochlear implants.
Mandarin compound vowels produced by prelingually deafened children with cochlear implants.
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DOI：
10.1016/j.ijporl.2017.04.012
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发表时间：
2017-06
影响因子：
1.5
通讯作者：
Xu L
中科院分区：
文献类型：
--
作者：
Yang J;Xu L
包括双元音和三元音在内的复合元音具有复杂的动态频谱特征。以前没有研究过人工耳蜗植入（CI）儿童的复合元音的产生。本研究考察了母语为普通话的汉语儿童的复合元音的动态特征。14名患有CI的语前语言障碍儿童（年龄2.9 - 8.3岁）和14名年龄匹配的听力正常（NH）儿童产生了包含6个普通话复合元音的单音节词（即，//、/a/、/uo/、/iε/、/ia/、/io/）。在元音持续时间的过程中，在九个等距的时间点测量前两个共振峰的频率值。所有共振峰频率值被归一化，然后用于计算元音轨迹长度和整体频谱变化率。结果表明，CI儿童产生的所有六个复合元音的持续时间显着延长。CI儿童产生复合元音共振峰运动的能力差异很大。一些CI儿童产生相对静态的共振峰轨迹，某些双元音，而其他人产生了某些元音更大的共振峰运动比NH儿童。作为一个群体，CI儿童大致遵循NH儿童的共振峰运动的大小模式，但他们表现出较低的共振峰变化率比NH儿童。研究结果表明，在言语习得的早期阶段，语前发育的儿童与CI，没有建立适当的目标和发音协调的复合元音的生产。这一初步的研究可能会揭示与CI语前语言障碍儿童的康复。
Compound vowels including diphthongs and triphthongs have complex, dynamic spectral features. The production of compound vowels by children with cochlear implants (CIs) has not been studied previously. The present study examined the dynamic features of compound vowels in native Mandarin-speaking children with CIs. Fourteen prelingually deafened children with CIs (aged 2.9 – 8.3 years old) and 14 age-matched, normal-hearing (NH) children produced monosyllables containing six Mandarin compound vowels (i.e., /aI/, /a℧/, /uo/, /iε/, /ia℧/, /io℧/). The frequency values of the first two formants were measured at nine equidistant time points over the course of the vowel duration. All formant frequency values were normalized and then used to calculate vowel trajectory length and overall spectral rate of change. The results revealed that the CI children produced significantly longer durations for all six compound vowels. The CI children's ability to produce formant movement for the compound vowels varied considerably. Some CI children produced relatively static formant trajectories for certain diphthongs whereas others produced certain vowels with greater formant movement than did the NH children. As a group, the CI children roughly followed the NH children on the pattern of magnitude of formant movement, but they showed a slower rate of formant change than the NH children. The findings suggested that prelingually deafened children with CIs, during the early stage of speech acquisition, had not established appropriate targets and articulatory coordination for compound vowel productions. This preliminary study may shed light on rehabilitation of prelingually deafened children with CIs.