Review of various methods of noise measurement; sources of aerodynamic noise are considered in three groups -- broad-band noise and its mechanisms, namely, pure aerodynamic noise, noise induced by turbulence and induced by vortex shedding; ordered noise consisting of pressure signature noise, wake interaction and field interaction noise; modulation and distortion effects, and its three propagation effects; main engine noise and noise of lifting rotor; results obtained in flight experiment where experimental rotor was run in forward flight; method of analysis; equation is given that provides necessary data for first design study of large helicopter noise.


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    Titel :

    Helicopter noise


    Weitere Titelangaben:

    Roy Aeronautical Soc -- J


    Beteiligte:
    Davidson, I.M. (Autor:in) / Hargest, T.J. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1965


    Format / Umfang :

    12 pages


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Helicopter noise

    Cox, C. M. | NTRS | 1983


    Helicopter Linear Noise

    Hans R. Aggarwal | AIAA | 1985


    TRANSONIC HELICOPTER NOISE

    Morgans, A. / Karabasov, S. / Dowling, A. et al. | British Library Conference Proceedings | 2003


    Transonic Helicopter Noise

    Aimee Morgans / Sergey Karabasov / Ann Dowling et al. | AIAA | 2005


    Helicopter Noise Helikopterljud

    I. Eriksson | NTIS | 1971