INTENSITY CODING AND DYNAMIC PROCESSES IN HEARING

听觉系统跟踪和解决变化的能力 声音的幅度和频率对听觉至关重要 感知和交流。这项建议侧重于幅度变化。 是一项全面的心理物理研究，研究的是解决和解决 从声音幅度的变化中提取信息。建议数 项目关注的是这种动态的日益复杂的方面 正在处理。这些项目的目标是：(1)了解如何 幅度变化被区分和编码，以及这种区分是如何 涉及检测由 正弦调幅；(2)解决以下基本问题 听觉频率分析和频谱频率区域如何确定和 影响幅度变化的时间加工；(3)确定和 描述检测特定幅度周期的能力是如何 受其他周期存在的影响；(4)描述 跨通道时间分辨率，具体地说，就是分辨 在不同频率区域发生的幅度变化的差异 或通道；(5)评估听觉频率的假设 在刺激和实验中追求两者的选择性“增强” 从理论上讲，这种动态过滤对动态 正在处理。 该项目将为以下项目提供至关重要的信息 描述和理解正常人听力的动态特性 最终，为了理解听力障碍的后果 在这些房产上。该项目将为以下项目提供标准化数据 评估听力障碍对动态过程的影响等 一般情况下，将为动态加工的设计提供依据 助听器和人工耳蜗等假体装置中的方案。

The ability of the auditory system to follow and to resolve changes in the amplitude and frequency of sound is of crucial importance for auditory perception and communication. This proposal focusses on amplitude changes and is a comprehensive psychophysical study of the ability to resolve and to extract information from changes in the amplitude of sound. The proposed projects are concerned with increasingly complex aspects of such dynamic processing. The objectives of these projects are: (1) to understand how amplitude changes are discriminated and coded, and how such discrimination relates to the detection of continuous amplitude changes produced by sinusoidal amplitude modulation; (2) to address fundamental questions of how auditory frequency analysis and spectral frequency region determine and affect temporal processing of amplitude changes; (3) to determine and describe how the ability to detect certain amplitude periodicities is affected by the presence of other periodicities; (4) to describe cross-channel temporal resolution, specifically, the ability to resolve differences in amplitude changes that occur in different frequency regions or channels; (5) to evaluate the hypothesis that auditory frequency selectivity 'sharpens' during stimulation and to pursue both experimentally and theoretically the implications of such dynamic filtering for dynamic processing. This project will provide information of fundamental importance for describing and understanding the dynamic properties of normal human hearing and, eventually, for understanding the consequences of hearing impairment on these properties. This project will provide normative data for evaluating the effects of hearing impairment on dynamic processes and, more generally, will provide a basis for the design of dynamic processing schemes in prosthetic devices such as hearing aids and cochlear implants.