COCHLEAR LOSS EFFECT ON SPECTRO-TEMPORAL ANALYSIS

该项目的长期目标是了解 耳蜗受损的听力障碍者在 背景噪音在本项目中特别感兴趣的是 正常听力中涉及时变声音的跨频率过程 和听力受损的听众。该项目的一个具体目标是 确定与不良相关的刺激特征 耳蜗受损听者的时间分析，通道内 和跨通道听觉过程。研究的一个相关目标是 在这方面，将确定响度恢复的作用， 时间分析该项目的第二个具体目标是 从竞争性的角度理解共调节掩蔽释放（CMR） 侦测线索这里特别关注的是竞争性线索的影响 在耳蜗受损的听众中，一些线索可能编码得很好， 其他人则表现不佳。第三个具体目标是确定时间 在时间分析中跨频率组合信息。一个目标 这里将确定跨频率能量如何组合在一个 听力受损的耳朵，当一些信息与区域相关联时， 良好的听力和其他信息与贫困地区有关 听证会第二个目标是确定时间信息是如何 结合正常听力的跨频率，测试假设， 耳朵可以在整个频率上求和能量，或者耳朵可以选择 听觉通道包含“最佳”信息。第四特定 目的探讨耳蜗性听力损失对认知功能的影响， 在混合噪声背景下的信号鉴别， 存在双耳差异线索的背景。中的研究 这个区域应该提供关于耳蜗丧失的影响的新信息 单耳和双耳掩蔽中的信号识别/辨别 release.测试将在经过隔音处理的房间中进行，使用强制 选择自适应程序。受试者将包括听力正常的对照组 具有耳蜗源性听力损失的听众群体。 将使用简单的描述性统计、相关性、 方差分析。

The long-term aim of the project is an understanding of the causes for the hearing disability experienced by cochlear-impaired listeners in background noise. Of particular interest in the present project are across-frequency processes involving time-varying sounds in normal-hearing and hearing-impaired listeners. One specific aim of this project is to determine the stimulus characteristics that are associated with poor temporal analysis in cochlear-impaired listeners, both for within-channel and for across-channel auditory processes. A related goal of the studies in this area will be to determine the role of loudness recruitment in temporal analysis. The second specific aim of the project is an understanding of comodulation masking release (CMR) in terms of competing detection cues. A particular focus here is the influence of competing cues in cochlear-impaired listeners where some cues may be coded well and others coded poorly. The third specific aim is to determine how temporal information is combined across frequency in temporal analysis. One goal here will be to determine how across-frequency energy is combined in a hearing-impaired ear, when some information is associated with regions of good hearing and other information is associated with regions of poor hearing. A second goal is to determine how temporal information is combined acrosS frequency in normal hearing, testing hypotheses that the ear can sum energy acrosS frequency, or that the ear can choose the auditory channel containing the "best" information. The fourth specific aim determine the effects of cochlear hearing loss on the recognition and discrimination of signals in comodulated noise backgrounds and in backgrounds where binaural difference cues are present. The studies in this area should provide new information about the effect of cochlear loss on signal recognition/discrimination in monaural and binaural masking release. Testing will be performed in a sound-treated room, using forced choice adaptive procedures. Subjects will include normal-hearing control groups and groups of listeners having hearing loss of cochlear origin. Data will be analyzed using simple descriptive statistics, correlation, and analysis of variance.