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The effect of tip vortex structure on helicopter noise due to blade/vortex interactionA potential cause of helicopter impulsive noise, commonly called blade slap, is the unsteady lift fluctuation on a rotor blade due to interaction with the vortex trailed from another blade....
général - core.ac.uk - PDF: hdl.handle.net
Should helicopter noise be measured differently from other aircraft noise? a review of the psychoacoustic literature... Particular attention was given to the impulsive noise known as blade slap....
Rating helicopter noiseThe effectiveness of the EPNL procedure in quantifying helicopter blade slap and tail rotor noise heard on approach some distance from the flyover position is addressed....
Evaluation of helicopter noise due to b blade-vortex interaction for five tip configurationsThe effect of tip shape modification on blade vortex interaction induced helicopter blade slap noise was investigated....
Helicopter noise: blade slap. part 2: experimental resultsBlade slap encountered in rotary wings and its effect on helicopter performance are reported....

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