Discrimination of reproducible noise as a function of bandwidth and duration
Discrimination of reproducible noise as a function of bandwidth and duration
复制标题
区分可再现噪声作为带宽和持续时间的函数
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
T. Hanna
中科院分区：
文献类型：
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作者：
T. Hanna
可再现的噪声突发的可辨别性作为带宽和持续时间的函数进行了研究。听众区分由两个相同的噪声波形或两个独立的噪声波形组成的试验。每次试验都会产生新的噪声波形。一般来说，随着带宽的增加，区分度提高。然而，歧视改善与持续时间增加，只有约25毫秒，超过这一点，它下降。另外的实验用（1）前向或后向掩蔽物（在比较刺激之间暂时干预或不干预）、（2）在50或300次试验中固定的两个噪声波形和（3）高频或低频噪声带检查辨别力。结果表明，超过25毫秒的可辨别性下降主要是由于中央起源的感觉相互作用，但与周边掩蔽，记忆干扰和注意力限制的一些影响。偏移距处的信息识别效果最好，低频信息识别效果好于高频信息。结果还表明，信封线索在一定条件下使用。
The discriminability of reproducible noise bursts was studied as a function of bandwidth and duration. Listeners discriminated between trials consisting of two identical noise waveforms or two independent noise waveforms. New noise waveforms were generated each trial. In general, discrimination improved with increasing bandwidth. However, discrimination improved with increasing duration only up to about 25 msec, beyond which it decreased. Additional experiments examined discriminability with (1) forward or backward maskers, which intervened or did not intervene temporally between the comparison stimuli, (2) two noise waveforms fixed over 50 or 300 trials, and (3) high- or low-frequency noise bands. Results suggested that the decrease in discriminability beyond 25 msec was due primarily to sensory interactions of a central origin but with some effect of peripheral masking, memory interference, and attentional limitations. Information at the offset was discriminated best, and low-frequency information was better discriminated than high-frequency information. The results also indicated that envelope cues were used in certain conditions.