Effect of compression amplification on older listeners

压缩放大对老年听众的影响

基本信息

批准号：
6650981
负责人：
KUMIKO T BOIKE
金额：
$ 2.75万
依托单位：
UNIVERSITY OF WASHINGTON
依托单位国家：
美国
项目类别：
财政年份：
2002
资助国家：
美国
起止时间：
2002-09-10 至
项目状态：
未结题

项目摘要

The aim of this research proposal is to examine the difficulty that older listeners who wear hearing aids have with speech recognition, with a focus on wide-dynamic range compression (WDRC) processing. To accomplish this, two areas will be examined: the effects of aging on temporal resolution and the effects of varying compression ratio on speech recognition in older listeners. WDRC amplification alters the temporal complexity of a signal. The effect of this processing on the speech recognition ability of older listeners with existing temporal processing deficits is still unknown. The situation is further complicated when the task involves recognition of speech, itself a temporally complex signal, in a background of temporally complex noise. The specific aims of this project include determination of how older hearing-impaired listeners are affected by amplitude modulation in background noise when listening to speech in noise processed by WDRC amplification. Older and younger hearing-impaired and normal- hearing listeners will be tested. Experimental tasks will include a speech recognition test in which speech is presented in three background noises of increasing temporal complexity. The speech and noise combinations will be processed by amplitude compression at three compression ratios. In addition, to determine if older listeners' performance with WDRC amplification is related to any underlying temporal resolution deficits, a modulation detection and a temporal- order judgment task will be completed. In addition to defining the auditory capacities and limitations of older listeners, these results will help to provide older listeners with optimal amplification.

这项研究建议的目的是研究戴着助听器的老年听众在语音识别方面的困难，重点是广泛动力范围压缩（WDRC）处理。为此，将研究两个领域：衰老对时间分辨率的影响以及压缩比变化的影响对老年听众语音识别的影响。 WDRC扩增改变了信号的时间复杂性。这种处理对具有现有时间处理缺陷的老年听众的语音识别能力的影响仍然未知。当任务涉及对语音的识别，这本身就是时间复杂的信号，在时间复杂的噪声的背景下，情况就变得更加复杂。该项目的具体目的包括确定在通过WDRC扩增处理的噪声中聆听语音时，在背景噪声中如何影响较旧的听力受损的听众。年龄较小的听力和正常听众的听众将进行测试。实验任务将包括一项语音识别测试，其中语音在时间复杂性增加的三个背景噪声中呈现。语音和噪声组合将通过三个压缩比下的振幅压缩处理。此外，要确定老年听众通过WDRC放大的表现是否与任何潜在的时间分辨率赤字有关，调制检测和时间级判断任务将完成。除了定义老年听众的听觉能力和局限性外，这些结果还将有助于为老年听众提供最佳的放大。