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目的观察低频中等强度噪声对于人对隐藏图形和速度估计作业绩效的影响。方法２０名健康青年男性受试者，在８５与９５ｄＢ（Ａ）分别暴露２小时，进行了隐藏图形和速度估计作业任务测试，并与５０ｄＢ（Ａ）暴露２小时作自身对照比较。结果与对照比较，在９５ｄＢ（Ａ）噪声条件下暴露２小时，隐藏图形作业的平均反应时显著延长（Ｐ＜０．０５），反应时绩效及综合绩效显著下降（Ｐ＜０．０１）；速度估计作业的正确率显著下降（Ｐ＜０．０１），错误的主要成分为低估比例显著升高（Ｐ＜０．０１）。但８５ｄＢ（Ａ）噪声条件下暴露２小时，仅隐藏图形作业的综合绩效下降及速度估计作业的低估比例显著升高（Ｐ＜０．０５）。结论本试验８５与９５ｄＢ（Ａ）两种强度噪声条件下暴露２小时，对隐藏图形和速度估计作业任务的绩效有一定的影响，表明在目前以保护听力为目的的卫生学标准容许范围的噪声强度，对较为复杂或脑力负荷较大的作业任务的工效会有一定的影响。
Objective To observe the effect of low frequency, moderate intensity noise on human performance of hidden graphics and velocity estimation. Methods Twenty healthy young male subjects were exposed for 2 hours at 85 and 95 dB (A), respectively. Hidden profile and velocity estimation tasks were tested and compared with 50 dB (A) exposure for 2 hours as self-control. Results Compared with the control, exposure to 95dB (A) noise for 2 hours resulted in a significant prolongation of average response time (P <0.05) and a decrease in performance and overall performance (P <0.01). The accuracy of speed estimation decreased significantly (P <0.01), and the main component of error was significantly lower (P <0.01). However, under the condition of 85dB (A) noise exposure for 2 hours, the overall performance decline and the estimated underestimation of speed estimation operation were significantly higher (P <0.05). Conclusions The exposure for 2 hours under 85 and 95 dB (A) intensity noise conditions has an impact on the performance of the hidden pattern and speed estimation tasks, indicating that in the current standards of hygienic standards for hearing protection, the allowable range of noise Strength, the more complex or mental workload of the larger task of ergonomics will have a certain impact.