A cavity acoustic system 1 comprises a cavity 2 that is recessed in a surface 4 of an aerodynamic structure such as an aircraft. The system has a cavity opening and an acoustically reflective structure 18, 20 located at least partially within the cavity 2. The acoustically reflective structure 18, 20 comprises one or more acoustically reflective surfaces 24, 26, 30, 32 and each acoustically reflective surface 24, 26, 30, 32 being oblique to a plane of the cavity opening 27. The one or more acoustically reflective surfaces 24, 26, 30, 32 may be arranged to reflect incident acoustic waves out of the cavity opening while avoiding reflection into a region 48 at or proximate to a leading edge 14 of the cavity 2. The cavity may be a landing gear bay or a weapons bay on an aircraft.
Cavity acoustic tones supression
2018-04-25
Patent
Electronic Resource
English