COCHLEAR IMPLANT--AUDITORY FUNCTION & SPEECH PERCEPTION

威尔逊等人。(1992)开发了信号处理策略， 在语音理解方面为使用 Ineraid人工耳蜗术。这项研究的长期目标是 以下是理解以下过程的一些基础 改进。研究的具体目的是： (I)评估和比较三组患者的频率分辨率 (那些语言理解能力优秀、一般和较差的人 当这些患者安装了(I)Ineraid时 处理战略，(2)与独联体战略和(3)与 CI/虚拟渠道战略。决议将分三个级别进行评估 在实验者控制的响度平衡条件下 (我们通常的方法)和处理器控制的响度平衡 条件， (2)通过测量处理机的输出，确定最低 支持频率的通道之间的信号电平差异 决议， (Iii)当患者第一次出现时，描述言语理解的变化 配备了两种新的加工策略，以适应频率的变化 决议， (Iv)联系患者言语理解的纵向变化 配备CIS或CIS/虚拟战略，以适应频率的变化 决议， (V)确定混合CIS/峰值拾取处理器是否会有所改进 语音识别和低频分辨率 (Vi)研究动态范围在语音理解中的作用 系统地降低可用于信号编码的动态范围， (Vii)评估幅度包络线索的哪些方面有助于 辅音识别中的发音和语气差异。

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.