Operational Noise Data for OH-58D Army Helicopters

Abstract

The Army needs helicopter noise source emission data for use in the Installation Compatible Use Zone (ICUZ) program and for environmental assessments. This research gathered noise source emission data for the OH-58D helicopter. The data were normalized to 250 ft for use in noise maps. The data were also used to develop sound exposure level (SEL) versus distance curves for comparison with other helicopter data. The data show that the A-weighted maximum noise level increases with airspeed for level flight, but the A weighted SEL increases only slightly. The highest A-weighted maximum level was produced by the out-of-ground effect hover. Landings produce the largest A-weighted SEL.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA246822

Entities

People

  • Kevin J. Murphy
  • L. J. Benson
  • Micheal J. White

Organizations

  • Construction Engineering Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Army Aircraft
  • Department Of Defense
  • Emission
  • Environmental Assessment
  • Fixed Wing Aircraft
  • Flight
  • Ground Effect
  • Helicopters
  • Level Flight
  • Measurement
  • Recording Systems
  • Rotary Wing Aircraft
  • Sound Pressure

Readers

  • Acoustics.
  • Aerospace Engineering