Patent ID: 8393435

Claim:
Noise abatement device for the trailing edge of a nozzle exhaust of hot gases or of an aircraft nacelle thrust inverter, said noise abatement device comprising: a plurality of moving chevrons disposed on a trailing edge of an exhaust nozzle of a turbojet or on a trailing edge of an outer cowl of the turbojet, the chevrons being disposed adjacent a first direction of airflow from a first side of the trailing edge and a second direction of airflow from a second side of the trailing edge; an actuating means able to cause the chevrons to move from a passive position in which the chevrons extend according to the first and second directions of airflow leaving the engine, into an active position in which at least part of each chevron is inclined with respect to the first and second directions of airflow, the actuating means being a low-dimensioned actuator means; wherein the active position is derived from the passive position by pivoting, combined with a translational movement, of at least part of each chevron about an axis substantially parallel to the first and second directions of airflow.