What is one main function of the auditory system during flight?

The primary function of the auditory system during flight is to monitor aircraft speed, particularly through the sounds generated by the aircraft's environment and systems. Pilots rely on auditory cues to assess performance and operational status. For example, the sound of airflow around the aircraft, engine noises, and other auditory signals can provide essential feedback regarding speed and control. These sounds can indicate changes in aerodynamic performance and help pilots determine if they are operating within safe parameters or if adjustments are necessary.

The other options relate to different aspects of flight operation. Engine temperature is primarily indicated through visual instruments rather than auditory cues. Fuel consumption metrics are typically tracked through gauge displays and cannot be assessed via sound. Similarly, cockpit ergonomics involves the design and layout of the cockpit rather than auditory signals, making it unrelated to the auditory system's function during flight.