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目的：观察低频中等强度噪声对人的双任务操作绩效和往意分配的影响．方法：在85，95dB（A）暴露1．5h期间，19名健康青年男性受试者进行了手控光标追踪及视觉oddall视觉-运动反应双任务测试．结果：视-运动反应任务的综合绩效有随噪声强度增加而减小的趋势，但无统计学意义，追踪任务绩效个体差异很大、随噪声强度的增加，非靶刺激与靶刺激正确率差值随噪声强度增加而减小，在强度为95dB（A）30min时达显著水平（P＜0．05），主要表现为靶刺激正确率提高（P＜0．05）；靶刺激与非靶刺激反应时差值显著增加，在噪声强度为95dB（A）30，60，90min时达显著水平（P〈0．05），主要表现为靶刺激的反应时增加，噪声使靶刺激的综合绩效提高，而对非靶刺激绩效无显著影响．结论：低频中等强度噪声暴露对光标追踪和oddball视觉-运动反应双任务操作绩效和注意分配有一定的影响．对较为复杂或脑力负荷较大的作业应制订低于现有卫生标准的工效学标准
Objective: To observe the effect of low frequency, medium intensity noise on human dual task performance and intentional distribution. METHODS: Ninety-five healthy young male subjects underwent hand-cursor tracking and visual oddall visual-motor response dual-task testing at 85 and 95 dB (A) exposures for 1.5 h. Results: The overall performance of visual-motor response task decreased with the increase of noise intensity, but there was no statistical significance. The individual performance of tracking task varied greatly. With the increase of noise intensity, the correct rate of non-target and target stimulation was poor (P <0.05), which was mainly due to the improvement of the accuracy of target stimulation (P <0.05). The values of target stimulation and non-target The time difference of stimulus response increased significantly, reaching significant level (P <0.05) at the noise intensity of 95 dB (A) at 30, 60 and 90 min, which was mainly reflected by the increase of response time of target stimulus and the comprehensive performance of noise Increase, while no significant impact on non-target stimulation performance. CONCLUSIONS: Low-frequency, moderate-intensity noise exposure has some effect on cursor tracking and oddball vision-motor response dual task performance and attentional allocation. For more complex or mental workload should be formulated lower than the existing hygienic standard ergonomic standards