COCHLEAR IMPLANT--AUDITORY FUNCTION & SPEECH PERCEPTION

人工耳蜗——听觉功能

• 批准号: 2125884
• 负责人: Michael F. Dorman
• 金额: $ 12.36万
• 依托单位: ARIZONA STATE UNIVERSITY-TEMPE CAMPUS
• 依托单位国家: 美国
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-01 至 1997-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2125884
• 关键词: auditory discrimination; biomedical equipment development; clinical trials; cochlear implants; cues; hearing; hearing tests; human subject; human therapy evaluation; longitudinal human study; loudness; sound frequency; speech recognition; voice

Wilson et al. (1992) have developed signal processing strategies which have produced improvements in speech understanding for patients who use the Ineraid cochlear implant. The long term goal of the research proposed here is to understand some of the processes which underlie the improvements. The specific aims of the research are: (i) to assess and compare frequency resolution in three groups of patients (those with excellent, average and poor speech understanding with their present Ineraid) when those patients are fitted with the (i) Ineraid processing strategy, (ii) with the CIS strategy and (iii) with the CIS/virtual channel strategy. Resolution will be assessed at three levels of loudness and in experimenter-controlled loudness balanced conditions (our usual approach) and in processor-controlled loudness balanced conditions, (ii) to determine, by measuring the outputs of the processors, the minimum differences in signal levels across channels which support frequency resolution, (iii) to relate changes in speech understanding, when patients are first fitted with the two new processing strategies, to changes in frequency resolution, (iv) to relate longitudinal changes in speech understanding, for patients fitted with the CIS or CIS/virtual strategies, to changes in frequency resolution, (v) to determine whether a hybrid CIS/peak picker processor will improve both speech recognition and low frequency resolution (vi) to investigate the role of dynamic range in speech understanding by systematically reducing the dynamic range available for signal coding, (vii) to assess which aspects of amplitude envelope cues contribute to voicing and manner distinctions in consonant identification.

Wilson等人（1992）已经开发了信号处理策略， 已经为那些使用 植入式人工耳蜗 提出了研究的长期目标 这里是了解一些过程的基础， 改进.研究的具体目标是： (i)评估和比较三组患者的频率分辨率 （优秀的，平均的和差的语言理解与他们的） 当这些患者配备（i）Ineraid时， 处理战略，（二）与CIS战略和（三）与 CIS/虚拟渠道战略。 分辨率将在三个级别进行评估 在实验者控制的响度平衡条件下 (our通常的方法）和处理器控制的响度平衡 条件， (ii)通过测量处理器的输出， 支持频率的信道之间的信号电平差异 分辨率， (iii)当患者第一次 这两种新的加工策略， 分辨率， (iv)与患者语言理解的纵向变化相关， 与CIS或CIS/虚拟战略相适应，以适应频率的变化 分辨率， (v)以确定混合CIS/峰值拾取器处理器是否会改善 语音识别和低频分辨率 (vi)研究动态范围在言语理解中的作用， 系统地减小可用于信号编码的动态范围， (vii)为了评估振幅包络线索的哪些方面有助于 辅音识别中的发音和方式区别。