噪声对人思维能力的影响

目的观察中等强度噪声对人的思维作业绩效的影响。方法在８５、９０ｄＢ（Ａ）暴露２ｈ期间，２４名健康青年男性受试者进行了连续计算、连续减法及识符检数作业任务测试。结果 在８５ｄＢ（Ａ）噪声条件下暴露１ｈ，与对照比较，被试者连续计算的正确率，在一定时间内计算总数、正确数元显著改变；但连续减法一定时间内正确数、计算总数均显著降低。在９０ｄＢ（Ａ）噪声暴露３０ｍｉｎ及２ｈ识符检数的平均反应时，反应时绩效均较

Effect of Noise on Human Mental Performance

Objective: To investigate the effect of moderate noise on human thinking performance. Methods: During 2 h of exposure to 85, 90 dB(A), successive calculation, successive subtraction and determining figures according symbol were performed in 24 healthy young male subjects. Results: After l h exposure to noise of 85 dB(A), there were no significant changes in the accurate rate, correct number and total number of successive calculation, but the correct number and total number of successive subtraction decreased significantly as compared with control (P< 0.05). At 30 and 120 min exposure to noise of 90 dB(A), the mean reaction time prolonged, performance of reaction time decrease significantly (P<0.01) in the test of determining figures according symbol as compared with control; its total performance had a tendency of decrease, but was not significant. When the subjects were divided into two group according to their E score of EPQ, significantly different performance of accurate rate and different total performance were demonstrated in the test of determining figures according to symbol at 2 h of exposure under 90 dB(A) noise. The performance of extrovert was higher than that of introvert. Conclusion: Moderate noise could affect performance of complex tasks with a higher workload and it had certain relationship with the personality of the subjects.