Study on the Effects of Noise on Crew's Mental Workload in Information Processing

In order to study the effects of noise on the mental workload of armored vehicle crews, the message transmittal task test is conducted with subjective evaluation results and task's error rate as indicators. The experimental results show that during the 60 min exposure to noise, compared with control group, subjective evaluation results of subjects increased with the increase of noise intensity, but the increase of the subjective evaluation results decreased as noise intensity increased; the error rate of control group was lower than that of the noise group, and the error rate increased with the increase of noise intensity. To sum up, noise has a certain impact on crew's mental workload, and mental workload of crew increases with the increase of noise intensity. When noise reaches a certain level, it has no significant influence on crew's mental workload.