Environmental noise in cockpit can have great influence on the pilots of a helicopter. The pilots can be both mentally and physically influenced, which can weaken the competence of recognition and information processing and cause air accidents. In this paper, to further investigate the impact of environmental noise on cockpit pilot’s performance against risk information during a flight, experiment is designed and implemented in different noise levels and different task difficulty. During experiment the response time and accuracy of subjects are measured and recorded, the noise annoyance of subjects is evaluated by a subjective questionnaire. The experimental data show that with the rising of environmental noise level, the response time increases and the accuracy declines in all task difficulty condition. Also, the noise annoyance of subjects grows sharply in higher noise level. Based on the experimental data and result, it can be concluded that the environmental noise has a remarkable negative impact on the performance of helicopter pilot when performing a task and/or facing risk information.
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