Helicopter flight procedures for community noise reduction

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Abstract

A computationally efficient, semiempirical noise model suitable for maneuvering flight noise prediction is used to evaluate the community noise impact of practical variations on several helicopter flight procedures typical of normal operations. Turns, "quick-stops," approaches, climbs, and combinations of these maneuvers are assessed. Relatively small variations in flight procedures are shown to cause significant changes to Sound Exposure Levels over a wide area. Guidelines are developed for helicopter pilots intended to provide effective strategies for reducing the negative effects of helicopter noise on the community. Finally, direct optimization of flight trajectories is conducted to identify low noise optimal flight procedures and quantify the magnitude of community noise reductions that can be obtained through tailored helicopter flight procedures. Physically realizable optimal turns and approaches are identified that achieve global noise reductions of as much as 10 dBA Sound Exposure Level.

Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
JournalAnnual Forum Proceedings - AHS International
StatePublished - Jan 1 2017
Event73rd American Helicopter Society International Annual Forum and Technology Display 2017 - Fort Worth, United States
Duration: May 9 2017May 11 2017

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

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