Modeling auditory processing of amplitude modulation .2. Spectral and temporal integration
Modeling auditory processing of amplitude modulation .2. Spectral and temporal integration
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DOI：
10.1121/1.420345
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发表时间：
1997-11-01
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;Kollmeier, B;Kohlrausch, A
提出并验证了一个多通道模型，描述了频谱和时间积分对随机噪声载波调制检测的影响。该模型基于调制滤波器组的概念，该概念在随附的论文[Dau et al.， J. Acoust.]章节102,2892-2905(1997)]用于窄带条件下的调制感知（单通道模型）。为了跨频率整合信息，该模型的检测过程将通道输出线性组合。在模型的检测阶段实现了跨时间的信息整合，即一种“多视”策略。文献数据和新数据都被用来验证模型。模型预测与Eddins的结果一致[J]。Acoust。第93节，470-479(1993)]与窄带刺激的时间调制传递函数（TMTF）相关的“时间常数”不随载频区域变化，并且随着刺激带宽的增加而单调降低。该模型能够预测调制频域的掩蔽模式，正如Houtgast [J]在实验中观察到的那样。Acoust。美国法典第85卷，1676-1680(1989)]。该模型也解释了谢夫特和约斯特的发现[J]。Acoust。Sec. Am. 88, 796-805(1990)]，从数据中得出的长“有效”积分时间常数比从TMTF截止频率中得出的时间常数大两个数量级。最后，该模型的时间求和特性允许在Viemeister和Wakefield早先使用的特定时间范式中预测数据[J]。Acoust。美国法典第90卷，858-865(1991)]。本文提出的调制滤波器组概念和最优决策算法的结合，似乎为描述窄带和宽带条件下的调制检测现象提供了一种强有力的策略。(C) 1997美国声学学会。
A multi-channel model, describing the effects of spectral and temporal integration in amplitude-modulation detection for a stochastic noise carrier, is proposed and validated. The model is based on the modulation filterbank concept which was established in the accompanying paper [Dau et al., J. Acoust. Sec. Am. 102, 2892-2905 (1997)] for modulation perception in narrow-band conditions (single-channel model). To integrate information across frequency, the detection process of the model linearly combines the channel outputs. To integrate information across time, a kind of ''multiple-look'' strategy, is realized within the detection stage of the model. Both data from the literature and new data are used to validate the model. The model predictions agree with the results of Eddins [J. Acoust. Sec. Am. 93, 470-479 (1993)] that the ''time constants'' associated with the temporal modulation transfer functions (TMTF) derived for narrow-band stimuli do not vary with carrier frequency region and that they decrease monotonically with increasing stimulus bandwidth. The model is able to predict masking patterns in the modulation-frequency domain, as observed experimentally by Houtgast [J. Acoust. Sec. Am. 85, 1676-1680 (1989)]. The model also accounts for the finding by Sheft and Yost [J. Acoust. Sec. Am. 88, 796-805 (1990)] that the long ''effective'' integration time constants derived from the data are two orders of magnitude larger than the time constants derived from the cutoff frequency of the TMTF. Finally, the temporal-summation properties of the model allow the prediction of data in a specific temporal paradigm used earlier by Viemeister and Wakefield [J. Acoust. Sec. Am. 90, 858-865 (1991)]. The combination of the modulation filterbank concept and the optimal decision algorithm proposed here appears to present a powerful strategy for describing modulation-detection phenomena in narrow-band and broadband conditions. (C) 1997 Acoustical Society of America.