Cockpit noise generation mechanisms in light aircraft

The high noise levels occurring in the cockpits of light, powered aircraft can significantly contribute to pilot fatigue, interfere with pilot communications with passengers and air traffic control, cause permanent hearing loss, and detract from an otherwise pleasurable flight experience. The levels and spectral features of the cockpit noise field are presented for a number of popular types of light aircraft, under different operating conditions. The dominant noise generation mechanisms are identified and the effectiveness of practical and impractical noise reduction techniques for existing light aircraft are estimated. The noise control design features for a new generation of light aircraft are explored.