听力学
人工耳蜗植入
分类
积极倾听
共振峰
人工耳蜗植入术
心理学
鉴定(生物学)
医学
语音识别
沟通
计算机科学
植物
生物
人工智能
元音
作者
Joseph H. Bochner,Vincent J. Samar,Emily Prud’hommeaux,Matt Huenerfauth
出处
期刊:Journal of Speech Language and Hearing Research
[American Speech-Language-Hearing Association]
日期:2022-11-17
卷期号:65 (11): 4429-4453
标识
DOI:10.1044/2022_jslhr-22-00038
摘要
Purpose: Phoneme categorization (PC) for voice onset time and second formant transition was studied in adult cochlear implant (CI) users with early-onset deafness and hearing controls. Method: Identification and discrimination tasks were administered to 30 participants implanted before 4 years of age, 21 participants implanted after 7 years of age, and 21 hearing individuals. Results: Distinctive identification and discrimination functions confirmed PC within all groups. Compared to hearing participants, the CI groups generally displayed longer/higher category boundaries, shallower identification function slopes, reduced identification consistency, and reduced discrimination performance. A principal component analysis revealed that identification consistency, discrimination accuracy, and identification function slope, but not boundary location, loaded on a single factor, reflecting general PC performance. Earlier implantation was associated with better PC performance within the early CI group, but not the late CI group. Within the early CI group, earlier implantation age but not PC performance was associated with better speech recognition. Conversely, within the late CI group, better PC performance but not earlier implantation age was associated with better speech recognition. Conclusions: Results suggest that implantation timing within the sensitive period before 4 years of age partly determines the level of PC performance. They also suggest that early implantation may promote development of higher level processes that can compensate for relatively poor PC performance, as can occur in challenging listening conditions.
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