Auditory Information Processing of Temporal Modulation

描述(由申请人提供)：本项目的目标是 听觉对时间调制的信息加工研究 系统。也就是说，目标是通过以下方式更好地理解方法和方式 提取并利用通过调制传递的信息。这个 提出的工作主要集中在时态信息处理的三个方面 调制：复杂调制的感知、建模和处理 语音中的调制。使用检测、区分和 语音清晰度范式，拟议的实验研究了这两个包络 以及精细结构的调制以及二者的时变相互作用 功能。为了为这项研究建立声源处理的背景， 建议的实验评估对复杂调制模式的感知 (真实来源的一个特征)，使用来源属性作为响应 标识符并检查对性能的影响 多个调制信息源之间的交互。检测和 辨别实验的目的是允许直接评估 复合调制的听觉加工模型。演讲研究是 基于处理语音调制的信号处理算法。 演讲研究的目的是为了更深入地了解 语音感知中的时间调制，并建议处理方案 可以增强假体装置的性能。具体地说，语音结果 通过组合的包络和相位调制获得的结果可以建议采用 补偿降低的动态范围和频谱转换 通过人工耳蜗术获得调制信息。多消息条件为 研究评估调制信息可以在多大程度上 按来源分类，并仍以有意义的方式利用。

DESCRIPTION (provided by applicant): The objective of this project is to investigate information processing of temporal modulation by the auditory system. That is, the goal is to better understand the method and manner by which information conveyed by modulation is extracted and utilized. The proposed work focuses on three aspects of information processing of temporal modulation: complex modulation perception, modeling, and processing of the modulation in speech. Using detection, discrimination, and speech-intelligibility paradigms, the proposed experiments study both envelope and fine-structure modulation and also the interaction of the two time varying functions. To establish a context of sound-source processing for this study, proposed experiments evaluate the perception of complex patterns of modulation (a characteristic of real-world sources), use a source attribute as a response identifier in many procedures, and examine the effects on performance of the interaction among multiple sources of modulation information. Detection and discrimination experiments are designed to allow for direct evaluation of models of auditory processing of complex modulation. The speech studies are based on signal-processing algorithms that manipulate the modulation in speech. The intent of the speech studies is to both gain insight into the role of temporal modulation in speech perception and to suggest processing schemes that may enhance the performance of prosthetic devices. Specifically, speech results obtained with combined envelope and phase modulation may suggest approaches to compensate for the reduced dynamic range and spectral transposition of modulation information with cochlear implants. Multi-message conditions are studied to evaluate the extent to which modulation information can be segregated by source and still utilized in a meaningful way.