COMPLEX SOUND ANALYSIS IN NORMAL AND IMPAIRED EARS

正常耳朵和受损耳朵的复杂声音分析

• 批准号: 2391103
• 负责人: John H Grose
• 金额: $ 19.51万
• 依托单位: UNIV OF NORTH CAROLINA CHAPEL HILL
• 依托单位国家: 美国
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-12-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2391103
• 关键词: auditory pathways; behavioral /social science research tag; clinical research; hearing; human subject; neural information processing; noise; perception; psychoacoustics; sensorineural hearing loss; sound frequency

DESCRIPTION: The natural acoustic environment of a listener is typically composed of multiple sound sources, each of which is spectrally complex and usually fluctuating in intensity. The ability of a listener to sensibly sift apart the multiple sound sources superimposed in the impinging sound wave constitutes the broad topic of perceptual organization. One of the main goals of this Project is to understand the role of amplitude modulation in the perceptual organization of spectrally-complex sound. This necessitates an understanding of the underlying processes involved in across-frequency temporal analysis. The other main Project goal concerns the effects of cochlear hearing loss on perceptual organization. Successful processing of a complex sound is affected by the fidelity with which the sound is encoded in the peripheral auditory system. Reductions in the information content of the encoded sound due to cochlear dysfunction must challenge more central stages of auditory processing. The proposed Project is broken down into three related Study Areas. The first Study Area examines across-frequency temporal processing in both normal-hearing and cochlear-impaired listeners. The second Study Area develops a general model of modulation processing where a tight linkage is maintained between the fluctuation pattern itself and the specific frequencies on which the fluctuation pattern is imposed. The third Study Area investigates the perceptual organization of multiple simultaneous modulation patterns. The results of this Project will provide a better understanding of the processes underlying perceptual organization in normal-hearing listeners and an objective appreciation of the difficulties experienced by listeners with cochlear hearing loss in competitive listening situations.

描述：听众的自然声学环境通常是 由多个声源组成，每个声源的频谱都很复杂 通常强度会波动。倾听者明智地倾听的能力 筛选出叠加在撞击声中的多个声源 波构成了感知组织的广泛主题。中的一个 该项目的主要目标是了解幅度调制的作用 在频谱复杂的声音的感知组织中。这 需要了解所涉及的底层流程 跨频率时间分析。其他主要项目目标涉及 耳蜗听力损失对知觉组织的影响。成功的 复杂声音的处理受到保真度的影响 声音被编码在外周听觉系统中。减少 由于耳蜗功能障碍而编码的声音的信息内容必须 挑战听觉处理的更核心阶段。拟议项目 分为三个相关的研究领域。第一研究区 检查正常听力和听力的跨频率时间处理 耳蜗受损的听众。第二研究区开发通用模型 调制处理，其中保持紧密联系之间 波动模式本身以及特定频率 施加波动模式。第三个研究领域调查 多个同时调制模式的感知组织。这 该项目的结果将提供对过程的更好理解 正常听力听众的基本知觉组织和 客观评价听众所经历的困难 竞争性听力情况下的耳蜗听力损失。