INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING

正常和听力受损的强度 DLS 和掩蔽

• 批准号: 3216033
• 负责人: MARY S. FLORENTINE
• 金额: $ 23.44万
• 依托单位: NORTHEASTERN UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1983
• 资助国家: 美国
• 起止时间: 1983-12-01 至 1995-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3216033
• 关键词: auditory discrimination; auditory feedback; auditory pathways; auditory stimulus; auditory threshold; cochlear lesion; cues; disease /disorder model; hearing disorders; hearing tests; human subject; loudness; model design /development; neural information processing; noise; perceptual maskings; psychoacoustics; psychometrics; sound frequency; speech

Our long term objective is to reach an understanding of the auditory system that will allow quantitative modeling of the perception of tones, noise, and speech in both normal and impaired hearing. Such models are important for understanding normal auditory processes and provide a basis for improving diagnosis and rehabilitation of hearing-impaired listeners. The proposed project aims to obtain psychoacoustic data that will allow further tests of the concept that excitation patterns and multi-band decision rules may provide a general framework for quantitative modeling of normal and impaired hearing. Based on 21,2AFC experiments, in normal, impaired, and masked-normal listeners, the proposed project will establish a firm basis for refining our excitation-pattern model of intensity discrimination and testing a number of hypotheses related to the decision process in this and other models. Our specific aims are: (1) to test the hypothesis that excitation-level Information decreases over time due to adaptation processes in the auditory system, intensity DLs for multiple tone bursts will be measured as functions of the number of bursts and the interburst interval. In other experiments, intensity DLs for brief tones will be measured in the presence of a preceding, adapting tone of various durations; (2) to provide a direct test of the hypothesis that Comodulation Masking Release, CMR, results from "listening in the valleys" and can be explained by an energy-detector model with a stimulus-driven, time-varying weighting of the signal channel, Conditional-On-a-Single-Stimulus (COSS) detection-probability functions will be measured for stimuli presented in multi-band maskers with coherent envelopes (which produce CMR) and with incoherent envelopes (which do not produce CMR); (3) to test the hypothesis that stimulus-driven, time-varying weights affect temporal integration for detection of a tone masked by noise, thresholds for tones presented in gated and continuous maskers with and without cue tones will be measured as a function of signal duration; (4) to assess how stimulus parameters govern the channel weights, thresholds for brief tones presented in gated maskers of various bandwidths will be measured as a function of a cue tone's level and duration; (5) to test the hypothesis that stimulus-driven, time-varying weights cause across-frequency integration to depend on signal duration and listening condition, thresholds for multi-tone complexes of various bandwidths will be measured as functions of stimulus duration and listening condition (gated versus continuous masker, signal bandwidth fixed or randomized across trials, and cue present or absent); (6) to test the hypothesis that widened attention bands obtained in gated maskers reflect the operation of stimulus-driven, time-varying weights, measurements on how attention bandwidth is affected by presentation of a cue prior to each signal interval will be obtained as functions of the masker's off-time and the masker-signal onset separation. These data will add significantly to our understanding of normal and impaired hearing and will be important for the development and testing of models of the auditory system.

我们的长期目标是了解听觉系统 这将允许对音调，噪音， 和语言能力的能力。 这样的模型很重要 了解正常的听觉过程，并为 改善听力受损者的诊断和康复。 的 拟议的项目旨在获得心理声学数据， 测试的概念，激励模式和多波段决策规则 可以提供一个一般的框架，定量建模的正常和 听力受损 基于21，2AFC实验，在正常，受损， 作为一个普通的听众，拟议的项目将建立一个坚实的基础， 用于改进我们的强度辨别的激发模式模型， 测试与决策过程相关的一些假设， 其他型号。 我们的具体目标是：（1）检验假设， 由于适应，信息随时间减少 听觉系统中的过程，多个短纯音的强度DL 将被测量为脉冲串数量和脉冲串间隔的函数 interval. 在其他实验中，简短音调的强度DL将是 在存在前一个，适应各种音调的情况下测量 持续时间;（2）提供一个假设的直接测试， 掩蔽释放（CMR）是“在山谷中倾听”的结果， 解释了一个能量探测器模型与刺激驱动，随时间变化 信号通道加权，单刺激条件（COSS） 检测概率函数将被测量的刺激， 具有相干包络（产生CMR）的多波段掩蔽器， 非相干包络（不产生CMR）;（3）检验假设 刺激驱动的时变权重影响时间积分， 检测被噪声掩蔽的音调， 有和没有提示音的门控和连续掩蔽将被测量为 信号持续时间的函数;（4）评估刺激参数如何支配 通道权重、门控掩蔽中呈现的简短音调的阈值 将作为提示音电平的函数进行测量 和持续时间;（5）检验刺激驱动、时变的假设 权重使得跨频积分取决于信号持续时间， 听力条件，各种多音复合体的阈值 带宽将作为刺激持续时间和听力的函数进行测量 条件（选通与连续掩蔽，信号带宽固定或 随机试验，提示存在或不存在）;（6）测试 假设在门控掩蔽中获得的加宽的注意带反映了 刺激驱动的操作，时变权重，如何测量 注意力带宽受提示呈现的影响， 信号间隔将作为掩蔽器的关断时间的函数获得， 掩蔽信号起始分离。这些数据将大大增加 我们对正常听力和听力受损的理解， 听觉系统模型的开发和测试。