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Time perception is extremely important to the understanding, design and use of complex aviation systems. This experiment focused on differences in time estimation, flight performance, and monitoring tasks. In a betweensubjects experiment, participants navigated through a flight scenario while monitoring a switch and listening to white noise at either 55dBA or 85dBA. Flight performance data and monitoring data were collected throughout the task. Participants also completed the NASA-TLX and the DSSQ-S. Statistical analyses showed that the noise condition did not significantly affect workload, monitoring abilities, task completion and subjective stress questionnaires for the dual task. However, the 85dBA condition significantly affected prospective time estimation. These results suggest that the dual task was not demanding enough, and the stress was not adequate to push participants out of the comfort range and experience a performance decrement.