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About: Helicopter noise reduction     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Whole100003553, within Data Space : dbpedia.org associated with source document(s)

Type: scientistyago:Aircraft102686568yago:Artifact100021939yago:Conveyance103100490yago:Craft103125870yago:Heavier-than-airCraft103510583yago:Helicopter103512147yago:Instrumentality103575240yago:Object100002684yago:PhysicalEntity100001930yago:WikicatHelicoptersyago:Vehicle104524313yago:Whole100003553 New Facet based on Instances of this Class

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).