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.

我们的长期目标是为听觉开发分析模型 在正常和听力受损中处理音调，噪音和语音的处理。 听觉科学领域的精确定量模型很重要 有效地恢复听力障碍并提供更好的 诊断工具。 我们成功地模拟听众受损的响度感知 表示源自掩盖的激发模式 模式可以用作建模正常和受损的一般框架 听力。 提出的研究检验了强度的假设 在正常听力和听力受损中，可以预测歧视 激发模式的基础。 在第一阶段，我们测试和 在正常听力中进行强度歧视的激发模型。 根据绝对阈值和掩盖的预测将是 与来自同一听众的强度歧视数据相比。 将在宽范围内测量纯音的强度歧视 频率和强度以及两色调复合物和 多色调复合物是带宽和水平的函数。 全部 测量将采用2i，2afc范式和自适应程序。 除了测试模型外，这些实验还将提供 全面的，凝聚力的一组无需参考数据，用于掩盖 在同一普通听众中的模式和强度歧视。 在第二阶段，该模型扩展到适用于有障碍的听众 主要是人工耳蜗。 该模型将根据 阈值和掩盖测量值。 因此得出的预测将 与这些听众的强度歧视表现相比 在第1阶段使用的刺激设置 受损，这些测量将在其受损的耳朵中进行 以及在他们的正常耳朵中安静下来，在掩饰下掩盖了噪音 频谱形式以模拟耳朵受损的听力损失。 这些 测量使我们能够分别评估增加的影响 阈值和频率选择性降低强度歧视的频率选择性 听力受损。