COCHLEAR IMPLANT--AUDITORY FUNCTION/SPEECH RECOGNITION

本文提出的研究的长期目标是： 使用多通道耳蜗的患者的语音识别方面 假体：（1）不同的初始（1个月）性能水平;（2） 植入物使用第一年的不同改善率和（3） 不同的终端性能水平。 初步研究表明，两个因素可能在很大程度上解释 对于终端性能的差异：音高感觉的范围 可通过假体和强度的动态范围 提供给患者。 我们建议评估听觉功能测量之间的关系 （音高缩放、频率DL、动态范围和强度DL）和语音 识别（元音和辅音识别，spondee识别， 单音节单词识别和句子中单词的识别）， 使用Symbion 4通道假体的患者。 两个实验 提出了 在一项实验中，听觉功能和言语功能的测量 将评估已达到渐近 语音识别水平。 将对四组10名患者进行测试- 两组的语音识别成绩较差，一组的平均成绩 语音识别得分和一组语音识别良好的人 成绩. 在第二个实验中，性能的测量将在 在患者（n =12）接受治疗后的1个月、6个月和1年间隔， 装上假肢 如果我们能把语音识别的差异和 听觉功能，那么我们将在理解方面迈出一大步 使用人工耳蜗的患者的语音识别。

The long term goals of the research proposed here is to account for three aspects of speech recognition by patients who use a multichannel cochlear prosthesis: (1) Different initial (1 month) levels of performance; (2) different rates of improvement during the first year of implant use and (3) different terminal levels of performance. Preliminary studies suggest that two factors may account in large measure for the differences in terminal performance: the range of pitch sensation available through the prosthesis and the dynamic range of intensity available to the patient. We propose to assess the relationship between measures of auditory function (pitch scaling, frequency DLs, dynamic range and intensity DLs) and speech recognition (vowel and consonant recognition, spondee recognition, monosyllabic word recognition and recognition of words in sentences) in patients who use the Symbion 4-channel prosthesis. Two experiments are proposed. In one experiment, measures of auditory function and measures of speech recognition will be assessed for patients who have reached an asymptotic level of speech recognition. Four groups of 10 patients will be tested-- two groups with poor speech recognition scores, one group with average speech recognition scores and one group with good speech recognition scores. In the second experiment, the measures of performance will be taken at intervals of 1 month, 6 months and 1 year after patients (n =12) have been fit with a prosthesis. If we can relate differences in speech recognition to differences in auditory function, then we will have gained a major step in understanding speech recognition by patients who use cochlear prostheses.