Time Resolution in Auditory Systems
Time Resolution in Auditory Systems
复制标题
听觉系统的时间分辨率
DOI：
10.1007/978-3-642-70622-6
复制
发表时间：
1985
影响因子：
3
通讯作者：
A. Michelsen
中科院分区：
文献类型：
--
作者：
A. Michelsen
三种类型的实验时间歧视被认为是。第一种是以短脉冲串的持续时间为自变量的短脉冲串的阈值检测。结果可以通过一个模型来描述，该模型包含一个对信号强度进行操作的“泄漏积分器”。适当的时间常数为200 msec。接下来是幅度调制的检测。作为调制频率（对于低调制频率）的函数而发现的阈值可以再次由“泄漏积分器”模型来描述，这次配备有20毫秒的时间常数。有人认为，为什么这两个模型是不兼容的：听觉系统似乎能够检测调制远比200毫秒的时间常数模型将允许更容易。更直接针对时间现象的是前向掩蔽和连续信号中间隙检测的实验。解释的结果是相当困难的，因为有一个特殊的非线性掩蔽的时间持久性，因为“振铃”的听觉过滤器是很难分开的持久性掩蔽。有人认为，为什么根据实验结果，应该得出这样的结论，即听觉系统是能够检测到的，2 -4分贝的强度衰减约。10 ms。这与我们可以推断的滤波器振铃一致。然而，它与时间积分的200毫秒时间常数模型不兼容：听觉系统检测增量的能力远远低于检测减量。结论是，每种类型的实验都会导致一个只描述该实验结果的模型。所述三种模式应被视为“特设”模式，因为它们不能合并为一种模式。
Three types of experiments on temporal discrimination are considered. The first is threshold detection of tone bursts with the duration of the burst as the independent variable. Results can be described by a model incorporating a "leaky integrator" which operates on the intensity of the signal. The appropriate time constant is 200 msec. Next comes the detection of amplitude modulation. The threshold found as a function of modulation frequency (for low modulation frequencies) can again be described by a "leaky integrator" model, this time equipped with a time constant of 20 msec. It is argued why these two models are incompatible: the auditory system appears to be able to detect modulations far easier than the 200 msec time constant model would allow. More directly aimed at temporal phenomena are experiments on forward masking and the detection of gaps in a continuous signal. Interpretation of the findings is rather difficult because there is a peculiar nonlinearity in the temporal persistence of masking and because the "ringing" of the auditory filters is difficult to separate from the persistence of masking. It is argued why, on the basis of experimental results, one should come to the conclusion that the auditory system is capable of detecting a ,2-4 dB decrement of intensity in approx. 10 ms. This is compatible with what we can infer about the ringing of the filters. However, it is incompatible with the 200 msec time constant model of temporal integration: the audi tory system is far less capable of detecting increments than decrements. The conclusion is that each type of experiment leads to a model describing only the results of that experiment. The three models described should be regarded as "ad hoc" models because they cannot be united into one model.
DOI：
10.1044/jshr.2303.646
发表时间：
1980-01-01
期刊：
JOURNAL OF SPEECH AND HEARING RESEARCH
影响因子：
--
作者：
FLORENTINE, M;BUUS, S;ZWICKER, E
通讯作者：
ZWICKER, E