Informational masking: Counteracting the effects of stimulus uncertainty by decreasing target-masker similarity
Informational masking: Counteracting the effects of stimulus uncertainty by decreasing target-masker similarity
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DOI：
10.1121/1.1577562
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发表时间：
2003-07-01
影响因子：
2.4
通讯作者：
Kidd, G
中科院分区：
文献类型：
--
作者：
Durlach, NI;Mason, CR;Kidd, G
以前的工作表明，目标掩蔽物的相似性，以及刺激的不确定性，影响的信息掩蔽量，发生在检测，歧视和识别任务。在本文报道的五个实验中的每一个中，音调目标的检测阈值在随机多音调掩蔽同时提出的目标音调测量两个条件下使用相同的一组五个听众。在一种情况下，目标被构造成与掩蔽物“相似”（S）;在另一种情况下，它被构造成与掩蔽物“不相似”（D）。特定的掩蔽物在实验中不同，但在两种条件下是恒定的。目标掩蔽物相似性在维度上变化，例如持续时间、感知位置、频率滑动方向和频谱时间相干性。组平均值结果显示，相对于S条件，D条件的掩蔽量大幅减少。此外，个体差异（信息掩蔽的标志）被发现在S条件下比在D条件下大得多。此外，听者信息掩蔽的脆弱性被发现是一致的，至少在一个中等程度的实验。(C)2003年，美国声学学会。
Previous work has indicated that target-masker similarity, as well as stimulus uncertainty, influences the amount of informational masking that occurs in detection, discrimination, and recognition tasks. In each of five experiments reported in this paper, the detection threshold for a tonal target in random multitone maskers presented simultaneously with the target tone was measured for two conditions using the same set of five listeners. In one condition, the target was constructed to be "similar" (S) to the masker; in the other condition, it was constructed to be "dissimilar" (D) to the masker. The specific masker varied across experiments, but was constant for the two conditions. Target-masker similarity varied in dimensions such as duration, perceived location, direction of frequency glide, and spectro-temporal coherence. Group-mean results show large decreases in the amount of masking for the D condition relative to the S condition. In addition, individual differences (a hallmark of informational masking) are found to be much greater in the S condition than in the D condition. Furthermore, listener vulnerability to informational masking is found to be consistent to at least a moderate degree across experiments. (C) 2003 Acoustical Society of America.