Binaural detection of 500-Hz tones in broadband and in narrowband masking noise: Effects of signal/masker duration and forward masking fringes
Binaural detection of 500-Hz tones in broadband and in narrowband masking noise: Effects of signal/masker duration and forward masking fringes
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DOI：
10.1121/1.2188373
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发表时间：
2006-05-01
影响因子：
2.4
通讯作者：
Freyman, Richard L.
中科院分区：
文献类型：
--
作者：
Bernstein, Leslie R.;Trahiotis, Constantine;Freyman, Richard L.
用宽带和窄带掩蔽器使用单间隔自适应矩阵程序测量500-HZ音调信号的nos pi阈值[C.Kairnbach，J Acoust]。SoC。上午好。88.2645-2655(1990)]。本研究的目的是调查和解释改变信号和掩蔽的持续时间以及在信号加噪声发生之前的前向掩蔽条纹的持续时间对阈值的影响。对于宽带和窄带噪声中的检测，添加掩蔽噪声的短暂前向条纹导致最短信号持续时间的阈值升高。与窄带相比，较长的前向条纹在掩蔽物为宽带时导致更大的阈值下降。数据的复杂模式可通过以下操作来解释：(1)与外围听觉滤波相关的“检测前”时间积分；(2)不同地影响宽带和窄带NOSPI阈值的持续时间相关的跨频率影响；(3)与中央双耳机制相关的“检测后”时间积分；以及(4)根据耳间相关性的变化而不是信号电平或信噪比本身来考虑检测阈值。(C)2006年美国声学学会。
NoS pi thresholds for a 500-Hz tonal signal were measured with broadband and with narrowband maskers using a single-interval adaptive matrix procedure [C. Kaernbach, J Acoust. Soc. Am. 88. 2645-2655 (1990)]. The purpose of the study was to investigate and to account for the effects on thresholds of varying the durations of the signals and maskers and the durations of forward masking fringes that preceded the occurrence of signal-plus-noise. For detection in both broadband and narrowband noise, the addition of brief forward fringes of masking noise resulted in elevations in threshold for the shortest signal durations. Longer forward fringes led to larger decreases in threshold when the masker was broadband as compared to when the masker was narrowband. The complex patterning of the data was explained by the operation of: (1) "predetection" temporal integration associated with peripheral auditory filtering; (2) duration-dependent, across-frequency influences that differentially affect broadband and narrowband NoS pi thresholds, (3) "post-detection" temporal integration associated with the central binaural mechanism, and (4) consideration of the detection thresholds in terms of changes in interaural correlation rather than in terms of signal level or signal-to-noise ratio, per se. (c) 2006 Acoustical Society of America.