Li Gang, Soli Sigfrid D, Zheng Yun
a Hearing Center/Hearing & Speech Science Laboratory, Department of Otolaryngology/Head and Neck Surgery , West China Hospital of Sichuan University , Chengdu , China and.
b House Clinic , Los Angeles , CA , USA.
Int J Audiol. 2017;56(sup2):S49-S59. doi: 10.1080/14992027.2017.1324643. Epub 2017 May 22.
To evaluate the effects of implant age and duration of implantation on development of Mandarin tone perception in paediatric cochlear implant recipients.
Retrospective cross-sectional evaluation of tone perception, as assessed with the Mandarin Early Speech Perception test at 3, 6, 12, 24, 36 and 48 months after activation.
A total of 143 subjects, 60 girls and 83 boys unilaterally implanted at 1-4 years of age comprised the sample. All the subjects were implanted with devices from one of three manufacturers.
Regardless of implant age, approximately 80% of the subjects obtained overall tone discrimination scores significantly above chance by 4 years after implantation, and average discrimination accuracy increased from approximately 68% to 79%. Acoustically distinct tones 1 and 4 were discriminated and recognised more accurately, while less distinct tones 2 and 3 were discriminated and recognised less accurately. Large individual differences in performance were evident.
Most Mandarin-speaking paediatric CI recipients discriminate tones above chance at 5 years of age with accuracy comparable to that of children with normal hearing at 2 years of age. Modest benefits of early implantation are evident.
评估植入年龄和植入时长对小儿人工耳蜗植入受者普通话声调感知发育的影响。
回顾性横断面评估声调感知，在开机后3、6、12、24、36和48个月时采用《普通话早期言语感知测试》进行评估。
共有143名受试者，年龄在1至4岁之间接受单侧植入，其中60名女孩，83名男孩，构成了样本。所有受试者均植入了来自三家制造商之一的设备。
无论植入年龄如何，约80%的受试者在植入后4年时总体声调辨别分数显著高于随机水平，平均辨别准确率从约68%提高到79%。声学上差异明显的声调1和4被辨别和识别得更准确，而差异较小的声调2和3被辨别和识别得不太准确。表现上存在明显的个体差异。
大多数说普通话的小儿人工耳蜗植入受者在5岁时辨别声调的能力高于随机水平，准确率与2岁正常听力儿童相当。早期植入有明显的适度益处。
