COCHLEAR IMPLANT--AUDITORY FUNCTION/SPEECH RECOGNITION

这里提出的这项研究的长期目标是解释三个 使用多通道人工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，有两个因素可能在很大程度上起作用。 终端性能的差异：音高感觉的范围 可通过假体和动态范围的强度 可供患者使用。 我们建议评估听觉功能的测量之间的关系 (音调缩放、频率DLS、动态范围和强度DLS)和语音 识别(元音和辅音识别、音节识别、 单音节单词识别和句子中单词的识别)中 使用Symbion四通道假体的患者。有两个实验 建议。 在一项实验中，听觉功能的测量和语音的测量 将评估达到渐近水平的患者的认知度 语音识别级别。四组10名患者将接受测试-- 两组语音识别成绩较差，一组平均 语音识别分数和语音识别良好的一组 得分。 在第二个实验中，性能测量将在 患者(n=12)术后1个月、6个月和1年的间隔 可以装上假肢。 如果我们可以将语音识别的差异与语音识别的差异联系起来 听觉功能，那么我们就在理解上有了很大的进步 使用人工耳蜗术的患者的语音识别。

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.