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    Noise Characteristics of Height Helicopters

    H. C. True / E. J. Rickley | NTIS | 1977

    Helicopter Noise Survey at Selected New York City Heliports

    E. J. Rickley / M. J. Brien / S. R. Albersheim | NTIS | 1983

    Helicopter Noise Definition Report UH-60A, S-76, A-109, 206-L

    J. S. Newman / E. J. Rickley / D. W. Ford | NTIS | 1981

    Helicopter Noise Exposure Curves for Use in Environmental Impact Assessment

    J. S. Newman / E. J. Rickley / T. L. Bland | NTIS | 1982

    Noise Level Measurements of Railroads: Freight Yards and Wayside

    E. J. Rickley / R. W. Quinn / N. R. Sussan | NTIS | 1974

    Helicopter Noise Definition Report: UH-60A, S-76, A-109, 206-L

    J. S. Newman / E. J. Rickley / D. W. Ford | NTIS | 1981

    Noise Measurement Flight Test of Five Light Helicopters

    E. J. Rickley / K. E. Jones / A. S. Keller et al. | NTIS | 1993

    Analysis of Helicopter Noise Data Using International Helicopter Noise Certification Procedures

    J. S. Newman / E. J. Rickley / D. A. Levanduski et al. | NTIS | 1986

    Noise Measurement Flight Test: Data/Analyses, Sikorsky S-76A Helicopter

    J. S. Newman / E. J. Rickley / T. L. Bland et al. | NTIS | 1984

    Noise Measurement Flight Test for Aerospatiale AS 355F TwinStar Helicopter: Data/Analyses

    J. S. Newman / E. J. Rickley / K. R. Beattie et al. | NTIS | 1984

    Analysis of Helicopter Noise Data Using International Helicopter Noise Certification Procedures

    J. S. Newman / E. J. Rickley / D. A. Levanduski et al. | NTIS | 1986

    Noise Measurement Flight Test: Data/Analyses Aerospatiale AS 355F TwinStar Helicopter

    J. S. Newman / E. J. Rickley / K. R. Beattie et al. | NTIS | 1984

    Noise Measurement Flight Test: Data/Analyses, Hughes 500 D/E Helicopter

    J. S. Newman / E. J. Rickley / T. L. Bland et al. | NTIS | 1984