关于听神经放电时间构型听觉模型的研究

A RESEARCH ON AUDITORY MODELING OF TEMPORAL PATTERNOF AUDITORY NERVE DISCHARGE

提出了一个基于听神经纤维放电时间模式的高度简化的听觉模型。该模型由两部分组成。第一部分是一个耳蜗模型,其中HRB和LRB粗略的模拟不同自发放电率听神经纤维的某些放电特性。第二部分是一个转换器 ,它产生一种频域表示 :选择性同步滤波器数(NumbersofSe lectively SynchronizedFilters ,NSSF)。这种NSSF频谱表示具有清晰 ,能强调高频域的频率分量及能强调频谱的变化与对比等几个特点。

This paper presents a highly simplified auditory model based on temporal pattern of auditory nerve discharge. The model consists of two stages. The first stage is a cochlear model incorporating HRB and LRB, which roughly simulate the mechanics relative to producing different spontaneous discharge activities of auditory nerve fibers. The second stage is a transformer which yield a frequency-domain spectral representation: Numbers of Selectively Synchronized Filters(NSSF:Numbers of Selectively Synchronized Filters). The resulting NSSF representation has several particular properties: it is a kind of clear spectral representation, it emphasizes information in high frequency region,it emphasizes spectral contrast.