A quantitative model of the ''effective'' signal processing in the auditory system .1. Model structure
A quantitative model of the ''effective'' signal processing in the auditory system .1. Model structure
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DOI：
10.1121/1.414959
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发表时间：
1996-06-01
影响因子：
2.4
通讯作者：
Kohlrausch, A
中科院分区：
文献类型：
--
作者：
Dau, T;Puschel, D;Kohlrausch, A
本文描述了听觉系统中信号处理的一个定量模型。该模型结合了一系列的预处理阶段和一个最优检测器作为决策装置。本文描述了各前处理阶段和最优检测器的实现。预处理级的输出是一个时变的活动模式，在该模式中添加了“内部噪声”。在决策过程中，将存储的待检测信号的时间表示(模板)与实际活动模式进行比较。该比较相当于计算两个时间模式之间的相关性，并且可与“匹配过滤”过程相比较。检测器本身在每个模拟阈值测量开始时从刺激的阈值上导出模板。该模型允许人们使用与实际实验中使用的相同的信号和心理物理程序来估计阈值。在所附文件[Dau et NL.，J.Acoust.秒。上午好。99,3623-3631(1996)]对人类观察者获得的数据与各种掩蔽条件下的最优检测器模型进行了比较。(C)1996年美国声学学会。
This paper describes a quantitative model for signal processing in the auditory system. The model combines a series of preprocessing stages with an optimal detector as the decision device. The present paper gives a description of the various preprocessing stages and of the implementation of the optimal detector. The output of the preprocessing stages is a time-varying activity pattern to which ''internal noise'' is added. In the decision process, a stored temporal representation of the signal to be detected (template) is compared with the actual activity pattern. The comparison amounts to calculating the correlation between the two temporal patterns and is comparable to a ''matched filtering'' process. The detector itself derives the template at the beginning of each simulated threshold measurement from a suprathreshold value of the stimulus. The model allows one to estimate thresholds with the same signals and psychophysical procedures as those used in actual experiments. In the accompanying paper [Dau et nl., J. Acoust. Sec. Am. 99, 3623-3631 (1996)] data obtained for human observers are compared with the optimal-detector model for various masking conditions. (C) 1996 Acoustical Society of America.