The passive and active noise control strategy in the aircraft interior noise

The stringent comfort requirements that the airliners are providing to the aircraft manufacturers, also for the small regional commuter are increasing the attention of the aircraft designer to the aircraft interior noise performance. The research on the design methodologies is very much improved in the last years providing new materials and new system like the active noise control usefull to get a more comfortable interior and achieve a large competition on the market. In this paper a general analysis of passive and active noise control approach for the aircraft design is gived providing some indications about the strategy used to select the optimum design approach.