DTIC ADA123467: Helicopter Noise Exposure Curves for pdf

DTIC ADA123467: Helicopter Noise Exposure Curves for

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Description of the Book:

This report establishes the current (1982) FAA helicopter noise data base for use in environmental impact assessment. The report sets out assumptions, methodologies, and techniques used in arriving at noise-exposure-versus-distance relationships. Noise data are provided for 15 helicopters, including five flight regimes each: takeoff, approach, level flyover, hover in-ground-effect (HIGE) and hover out-of-ground effect (HOGE). When possible, level flyover data are presented for a variety of airspeeds. Sound exposure level (SEL) is provided for all operational modes except hover. In the case of hover operations (both HOGE and HIGE), the maximum A-Weighted Sound Level (LAM) is identified as a function of distance. The report also includes a discussion of helicopter performance characteristics required for full computer modeling of helicopter/heliport noise exposure. (Author

• Creator/s: Defense Technical Information Center
• Date: 11/1/1982
• Year: 1982
• Book Topics/Themes: DTIC Archive, Newman, J Steven, FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF ENVIRONMENT AND ENERGY, *DATA BASES, *EXPOSURE(GENERAL), *ENVIRONMENTAL IMPACT, *AIRCRAFT NOISE, PERFORMANCE(ENGINEERING), HELICOPTERS, FLIGHT, PLANNING, DATA REDUCTION, TAKEOFF, AIRSPEED, DATA ACQUISITION, TABLES(DATA), RANGE(DISTANCE), AIRPORTS, SOUND PRESSURE, NOISE POLLUTION, HOVERING, EXTRAPOLATION, CONTOURS, APPROACH, HELIPORTS

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