The present work is part of a program, the objective of which is to find practicable ways of reducing the external noise level of light airplanes in order to make them less objectionable to persons on the ground. This report covers noise measurements on standard light airplanes and on similar airplanes equipped with engine mufflers, propeller reduction gears, and propellers with various numbers of blades and blade shapes.


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    Title :

    Experiments in External Noise Reduction of Light Airplanes


    Contributors:
    L. L. Beranek (author) / F. S. Elwell (author) / J. P. Roberts (author) / C. F. Taylor (author)

    Publication date :

    1950


    Size :

    110 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Experiments in external noise reduction of light airplanes

    Beranek, L.L. / Elwell, F.S. / Roberts, J.P. et al. | Engineering Index Backfile | 1950


    Experiments in External Noise Reduction of Light Airplanes

    Beranek, Leo L / Elwell, Fred S / Roberts, John P | NTRS | 1950