For a number of years the National Physical Laboratory, supported by the Ministry of Defense, has been developing AIRNOISE, a mathematical model for computing aircraft noise contours. The model is now being extended to include helicopter operations. In order to provide basic source noise data for the model, a special noise trial - Exercise Keevil - has been conducted at RAF Keevil in Wiltshire. One helicopter of each of six types performed a variety of flight operations over an array of microphones. Information on aircraft position and speed were obtained by video tracking techniques. The report describes the trial and presents the results obtained. (Copyright (c) Crown Copyright 1993).


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    Title :

    Exercise Keevil: Noise Levels of Six Military Helicopters


    Contributors:
    B. F. Berry (author) / A. L. Harris (author) / R. J. Weston (author) / D. Steele (author)

    Publication date :

    1993


    Size :

    38 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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