Smith A P
Department of Experimental Psychology, University of Oxford, England.
Int Arch Occup Environ Health. 1988;60(4):307-10. doi: 10.1007/BF00378479.
Studies of sustained monitoring of sensory information have shown noise-induced impairments only when the level is above 95 dB. Recent results suggest that tasks involving the monitoring of cognitive information may be vulnerable at lower intensities. This last point was confirmed in the present study which used a dual task. Noise reduced the hit-rate on a task involving detection of repeated numbers but had no effect on the average estimate of the relative probabilities of two classes of events. Noise did, however, increase the frequency of very inaccurate estimates. The noise effects were not altered by changes in the priority, difficulty or probability of the two tasks.
对感官信息持续监测的研究表明，只有当噪声水平高于95分贝时才会出现噪声诱发的损伤。最近的结果表明，涉及认知信息监测的任务在较低强度下可能更容易受到影响。这一点在本研究中使用双重任务得到了证实。噪声降低了涉及检测重复数字任务的命中率，但对两类事件相对概率的平均估计没有影响。然而，噪声确实增加了极不准确估计的频率。噪声效应不会因两项任务的优先级、难度或概率的变化而改变。
