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)


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    Title :

    Helicopter Noise Exposure Curves for Use in Environmental Impact Assessment


    Contributors:
    J. S. Newman (author) / E. J. Rickley (author) / T. L. Bland (author)

    Publication date :

    1982


    Size :

    168 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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