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: 3398329
• 负责人: MARY S. FLORENTINE
• 金额: $ 10.25万
• 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 1986-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3398329
• 关键词: auditory discrimination; auditory stimulus; cochlear lesion; disease /disorder model; hearing disorders; hearing tests; human subject; loudness; model design /development; neural information processing; noise; perceptual maskings; psychoacoustics; sound frequency; speech

Our long-term goal is to develop analytic models for the auditory processing of tones, noise, and speech in normal and impaired hearing. Precise quantitative models in the area of auditory science are important to effectively rehabilate hearing impairment and to provide better diagnostic tools. Our successful modeling of loudness perception in impaired listeners indicates that excitation patterns, which are derived from masking patterns, may serve as a general framework for modeling normal and impaired hearing. The proposed research tests the hypothesis that intensity discrimination, both in normal and impaired hearing, can be predicted on the basis of excitation patterns. In Phase I, we test and excitation-pattern model for intensity discrimination in normal hearing. Predictions derived on the basis of absolute thresholds and masking will be compared to intensity discrimination data from the same listeners. Intensity discrimination will be measured for pure tones over a wide range of frequencies and intensities as well as for two-tone complexes and multi-tone complexes as a function of bandwidth and level. All measurements will employ a 2I, 2AFC paradigm with an adaptive procedure. In addition to testing the model, these experiments will also provide a comprehensive, cohesive set of direly needed reference data for masking patterns and intensity discrimination in the same normal listeners. In Phase II, the model is extended to apply to listeners with impairments of predominantly cochlear origin. The model will be modified on the basis of threshold and masking measurements. Predictions thus derived will compared to these listeners' intensity discrimination performance for the set stimuli used in Phase I. For at least three listeners with unilateral impairments, these measurements will be performed in their impaired ears as well as in their normal ears in quiet and under masking with a noise spectrally shaped to simulate the hearing loss in the impaired ear. These measurements permit us to separately assess the effects of increased thresholds and reduced frequency selectivity on intensity discrimination in impaired hearing.

我们的长期目标是开发听觉分析模型 正常和听力受损时的音调、噪音和语音处理。 听觉科学领域精确的定量模型很重要 有效康复听力障碍并提供更好的服务 诊断工具。 我们成功地对受损听众的响度感知进行了建模 表示激发模式，源自掩蔽 模式，可以作为正常和受损建模的通用框架 听力。 拟议的研究测试了以下假设：强度 正常听力和听力受损的歧视都可以预测 激励模式的基础。 在第一阶段，我们测试并 正常听力强度辨别的激励模式模型。 基于绝对阈值和掩蔽得出的预测将是 与来自相同听众的强度辨别数据进行比较。 将对大范围内的纯音进行强度辨别测量 频率和强度以及双音复合体和 多音复合体作为带宽和电平的函数。 全部 测量将采用 2I、2AFC 范式和自适应程序。 除了测试模型之外，这些实验还将提供 用于屏蔽急需的全面、有凝聚力的参考数据集 相同正常听众的模式和强度歧视。 在第二阶段，该模型扩展到适用于有障碍的听众 主要起源于耳蜗。 模型将在此基础上进行修改 阈值和掩蔽测量。 由此得出的预测将 与这些听众的强度辨别表现相比 设置第一阶段使用的刺激。对于至少三个单侧听众 损伤，这些测量将在他们受损的耳朵中进行 以及在安静和噪音掩盖下的正常耳朵中 频谱形状可以模拟受损耳朵的听力损失。 这些 测量使我们能够单独评估增加的影响 强度歧视的阈值和降低的频率选择性 听力受损。