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: 7852649
• 负责人: John H Grose
• 金额: $ 7.62万
• 依托单位: UNIV OF NORTH CAROLINA CHAPEL HILL
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-17 至 2009-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7852649
• 关键词: Acoustics; Adult; Affect; Age; Aging-Related Process; Analysis of Variance; Area; Auditory; Auditory system; Brain; Cochlear Hearing Loss; Code; Complex; Data; Ear; Elderly; Environment; Frequencies; Goals; Health; Hearing; Lead; Measures; Methodology; Participant; Pattern; Plant Roots; Process; Psychophysiology; Public Health; Research Project Grants; Role; Signal Transduction; Source; Speech; Stimulus; Structure; Testing; Time; age related; design; direct application; hearing impairment; interest; perceptual organization; relating to nervous system; research study; sound; statistics; stimulus processing

DESCRIPTION (provided by applicant): Most everyday listening environments consist of a multitude of sounds, many of which are fluctuating in level over time. The way in which the brain sifts apart this acoustic complex into its constituent sound sources is referred to as auditory perceptual organization. The root interest of this project is in understanding the role of temporal processing in perceptual organization, and how aging and impaired auditory systems can compromise this ability. The focus of this project is on delineating the specific types of temporal processing deficits that emerge early in the aging process, and on differentiating these from deficits associated with advanced age and cochlear hearing loss. Three areas of temporal processing are investigated: (1) stimulus onsets and temporal fine structure; (2) temporal envelope coding; and (3) the relationship between temporal envelope processing and spectral integration in modulated maskers. The project utilizes both psychophysical and electrophysiological methodologies, and incorporates both speech and non-speech measures. The experiments test adults across a wide age range and include participants with normal hearing as well as hearing loss. Data will be analyzed using descriptive statistics, tests of correlation, and analyses of variance. The relevance of the project to public health is that it will lead to a clearer understanding of how the temporal features of sound are processed, and how changes in the auditory system due to age and hearing loss might affect these abilities. This research project is relevant to public health because it advances our understanding of how good hearing depends on the ability to process temporal features of sound. The project has direct application to hearing health because it is designed is to uncover how changes in the auditory system due to age and hearing loss affect the ability to process important temporal features.

描述（由申请人提供）：大多数日常收听环境由多种声音组成，其中许多声音的水平随着时间的推移而波动。大脑将这种声学复合体筛选成其组成声源的方式被称为听觉感知组织。这个项目的根本兴趣是理解时间处理在感知组织中的作用，以及衰老和受损的听觉系统如何损害这种能力。该项目的重点是描绘特定类型的时间处理缺陷出现在衰老过程的早期，并区分这些与先进的年龄和耳蜗听力损失相关的赤字。研究了时间加工的三个领域：（1）刺激起始和时间精细结构;（2）时间包络编码;（3）调制掩蔽中时间包络加工和频谱整合之间的关系。该项目利用心理物理学和电生理学方法，并结合语音和非语音措施。这些实验测试了不同年龄段的成年人，包括听力正常和听力损失的参与者。将使用描述性统计、相关性检验和方差分析对数据进行分析。该项目与公共卫生的相关性在于，它将使人们更清楚地了解声音的时间特征是如何处理的，以及由于年龄和听力损失而引起的听觉系统变化如何影响这些能力。这项研究项目与公共卫生有关，因为它促进了我们对良好听力如何取决于处理声音时间特征的能力的理解。该项目直接应用于听力健康，因为它旨在揭示由于年龄和听力损失导致的听觉系统变化如何影响处理重要时间特征的能力。