Amsterdam Center for Language and Communication, University of Amsterdam, the Netherlands.
J Speech Lang Hear Res. 2010 Dec;53(6):1440-57. doi: 10.1044/1092-4388(2010/09-0252). Epub 2010 Aug 5.
This study examined the use of different acoustic cues in auditory perception of consonant and vowel contrasts by profoundly deaf children with a cochlear implant (CI) in comparison to age-matched children and young adults with normal hearing.
A speech sound categorization task in an XAB format was administered to 15 children ages 5-6 with a CI (mean age at implant: 1;8 [years;months]), 20 normal-hearing age-matched children, and 21 normal-hearing adults. Four contrasts were examined: //-/a/, /i/-/i/, /bu/-/pu/, and /fu/-/su/. Measures included phoneme endpoint identification, individual cue reliance, cue weighting, and classification slope.
The children with a CI used the spectral cues in the /fu/-/su/ contrast less effectively than the children with normal hearing, resulting in poorer phoneme endpoint identification and a shallower classification slope. Performance on the other 3 contrasts did not differ significantly. Adults consistently showed steeper classification slopes than the children, but similar cue-weighting patterns were observed in all 3 groups.
Despite their different auditory input, children with a CI appear to be able to use many acoustic cues effectively in speech perception. Most importantly, children with a CI and normal-hearing children were observed to use similar cue-weighting patterns.
本研究比较了植入人工耳蜗的重度聋儿童与年龄匹配的正常听力儿童和年轻成人在听觉感知辅音和元音对比时对不同声学线索的使用情况。
采用 XAB 格式的语音感知分类任务对 15 名植入人工耳蜗的年龄在 5-6 岁（植入时的平均年龄为 18 个月）的儿童、20 名年龄匹配的正常听力儿童和 21 名正常听力成人进行了测试。共检查了四个对比：//-/a/、/i/-/i/、/bu/-/pu/和/fu/-/su/。测量指标包括音素端点识别、个体线索依赖、线索加权和分类斜率。
植入人工耳蜗的儿童在/fu/-/su/对比中对频谱线索的使用效果不如正常听力儿童，导致音素端点识别较差，分类斜率较浅。其他三个对比的表现差异不显著。成人的分类斜率始终明显高于儿童，但在所有三组中观察到相似的线索加权模式。
尽管听觉输入不同，但植入人工耳蜗的儿童似乎能够有效地在语音感知中使用许多声学线索。最重要的是，植入人工耳蜗的儿童和正常听力儿童观察到的线索加权模式相似。
