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Flow-operated sound generator e.g. for providing active noise damping or acoustic warning signal, has flow boundary layer altered by controlled actuators within aerodynamic structure inserted in flow
Flow-operated sound generator e.g. for providing active noise damping or acoustic warning signal, has flow boundary layer altered by controlled actuators within aerodynamic structure inserted in flow
The sound generator has controlled actuators integrated in an aerodynamic structure inserted in the flow path for influencing the flow boundary layers, for providing volume divergence and forces for acoustic dipole and monopole radiators. Sound and/or flow sensors are located in the noise field for feedback control of the actuators, to provide interference noise for active noise damping.
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