Helicopter noise reduction
Reducing the noise caused by helicopters / From Wikipedia, the free encyclopedia
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Helicopter noise reduction is a topic of research into designing helicopters which can be operated more quietly, reducing the public-relations problems with night-flying or expanding an airport. In addition, it is useful for military applications in which stealth is required: long-range propagation of helicopter noise can alert an enemy to an incoming helicopter in time to re-orient defenses (see acoustic signature).
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (July 2008) |