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Auditory Information Processing of Temporal Modulation

时间调制的听觉信息处理

基本信息

批准号：
7208973
负责人：
STANLEY E SHEFT
金额：
$ 17.54万
依托单位：
LOYOLA UNIVERSITY OF CHICAGO
依托单位国家：
美国
项目类别：
财政年份：
2003
资助国家：
美国
起止时间：
2003-04-01 至 2009-03-31
项目状态：
已结题

项目摘要

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.

描述（由申请人提供）：本项目的目标是研究听觉对时间调制的信息加工系统也就是说，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送的信息。的提出的工作重点是三个方面的信息处理的时间调制：复杂的调制感知，建模和处理言语中的转调使用检测、辨别和语音清晰度范例，建议的实验研究两个信封和精细结构调制，以及两个时变功能协调发展的为了建立本研究的声源处理背景，所提出的实验评估复杂调制模式的感知（真实世界来源的一个特征），使用来源属性作为响应标识符在许多程序，并检查对性能的影响，多个调制信息源之间的相互作用。检测和区分实验的目的是允许直接评估复杂调制的听觉处理模型。言语研究是基于操纵语音调制的信号处理算法。言语研究的目的是为了深入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。具体而言，演讲结果结合包络和相位调制获得的结果可能建议采用补偿降低的动态范围和频谱移位，调制信息与耳蜗植入。多消息条件是研究以评估调制信息可以被按来源分类，并仍以有意义的方式加以利用。