Temporal Processing Ability in Older Cochlear-Implant Users

项目摘要/摘要 该项目的长期目标是了解年龄对耳聋患者语音识别的影响。 李尔-种植体(CI)使用者。拟议研究的具体目标是调查基本的 老年CI使用者听觉时间处理的测量以建立与年龄相关的时间 处理赤字。拟议的实验旨在测量心理物理温度-- 年轻和年长CI用户的临时性处理能力。目标1将测量单电极间隙 在不同载波脉冲率下的检测能力。这项研究将检验以下假设：较老的CI 用户在简单的非语音时间处理任务上表现出较差的性能，尤其是 尤其是在快速载波速率下。目标2将测量单电极调幅(AM)检测- 在不同载波脉冲率下的发射能力。这项研究将检验这一假设，即较老的CI用户 与年轻的CI用户相比，需要更大的调制深度才能进行检测，尤其是 以快速的载波率。电生理反应(电诱发复合动作电位- TALS[eCAPs])也将在这两个目标中进行测量，以调查外围设备的贡献 神经存活，否则可能会混淆年龄对中枢听觉系统的影响- 临终处理能力。该培训计划包括广泛的数字信号PRO教学。 以及与拟议研究相关的高级统计分析。结果来自于 拟议的项目将扩大对CI中个体差异的潜在来源的理解 结果，特别是对于较年长的CI用户。这一知识将有助于开发改进的CI PRO 有听觉时间加工缺陷的CI用户的语法技术。

Project Summary/Abstract The long-term aim of this project is to understand the effect of age on speech recognition in coch- lear-implant (CI) users. The specific objective of the proposed research is to investigate basic measures of auditory temporal processing in older CI users to establish age-related temporal processing deficits. The proposed experiments are designed to measure psychophysical tem- poral processing ability in younger and older CI users. Aim 1 will measure single-electrode gap detection ability at different carrier pulse rates. This study will test the hypothesis that older CI users will display poorer performance on simple, non-speech temporal processing tasks, espe- cially at fast carrier rates. Aim 2 will measure single-electrode amplitude-modulation (AM) detec- tion ability at different carrier pulse rates. This study will test the hypothesis that older CI users will require larger depths of modulation for detection compared to younger CI users, particularly at fast carrier rates. Electrophysiological responses (electrically evoked compound action poten- tials [ECAPs]) will also be measured in both aims to investigate the contribution of peripheral neural survival, which could otherwise confound the effect of age alone, on central auditory tem- poral processing ability. The training program involves extensive instruction in digit signal pro- cessing and advanced statistical analysis relevant to the proposed research. The results from the proposed project will expand the understanding of potential sources of individual variability in CI outcomes, particularly for older CI users. This knowledge will help to develop improved CI pro- gramming techniques for CI users with auditory temporal processing deficits.