听觉非线性信号处理的心理声学实验研究

发布时间：2018-07-03 02:04

本文选题：听觉感知 + 随机共振　；参考：《华中科技大学》2014年硕士论文

【摘要】：听觉感知中非线性信号的处理一直是听觉研究中的重点，了解听觉感知中的非线性信号处理有助于加强我们对听觉独特的信号处理功能的认识。课题组先前的工作已经从理论与实验上证实听觉感知中的阈下随机共振，导师新的理论认为在有时间积分信号处理中还存在阈上随机共振以及听觉可通过耳蜗中外毛细胞的主动效应的参数调节实现选择性注意。本研究设计了两个实验，，通过心理声学实验的方法分别研究加噪声后的听觉强度辨别阈的变化以及注意与非注意情况下听阈的变化，对上述理论作实验检验。实验观察到了噪声使听觉强度辨别阈限下降的阈上随机共振现象，和选择性注意中绝对听觉阈限的下降。第一章介绍了听觉感知特性及本文所要研究的内容，并简单介绍了听觉中随机共振研究背景以及听觉选择性注意机制。第二章介绍了本文第一个实验的理论知识：随机共振和阈上随机共振，以及具体介绍了本次实验即加高斯白噪声时对听力正常人的听觉辨别阈的影响。并对此从结果分析出，听觉感知中存在阈上随机共振。第三章介绍了本文第二个实验，首先简单介绍了选择性注意，然后就选择性注意对听觉感知阈的影响这一问题设计了实验，并从结果证明了选择性注意能降低人的听阈。第四章是总结和展望。
[Abstract]:The processing of nonlinear signals in auditory perception has always been the focus of hearing research. Understanding the nonlinear signal processing in auditory perception helps to strengthen our understanding of the unique auditory signal processing function. The previous work of the topic group has been from the theoretical and experimental evidence of the subliminal stochastic resonance in the sense of auditory perception, and the new theory of the tutor's theory. In this study, two experiments were designed to study the changes in the auditory intensity discrimination threshold and the attention and the difference. The above theory is tested by the change of the hearing threshold. The experimental observation of the threshold random resonance phenomenon that noise makes the hearing intensity discrimination threshold drop, and the decrease of the absolute hearing threshold in selective attention.
In the first chapter, the characteristics of auditory perception and the contents of this paper are introduced, and the background of the study of random resonance in hearing and the mechanism of auditory selective attention are briefly introduced.
The second chapter introduces the theoretical knowledge of the first experiment: stochastic resonance and suprimiminal stochastic resonance, as well as the effect of this experiment on hearing discrimination threshold of normal hearing people when Gauss white noise is added, and the results show that there is an upper threshold random resonance in auditory perception.
The third chapter introduces the second experiments in this paper. First, it introduces the selective attention, and then designs the experiment on the effect of selective attention on the auditory perception threshold, and the results show that selective attention can reduce the hearing threshold of the human.
The fourth chapter is a summary and prospect.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.7

【相似文献】