The relationships between aircraft operating conditions and interior noise and the degree to which ground testing can be used in lieu of flight testing for performing interior noise research were studied. The results show that the noise inside light aircraft is strongly influenced by the rotational speed of the engine and propeller. Both the overall noise and low frequency spectra levels were observed to decrease with increasing high speed rpm operations during flight. This phenomenon and its significance is not presently understood. Comparison of spectra obtained in flight with spectra obtained on the ground suggests that identification of frequency components and relative amplitude of propeller and engine noise sources may be evaluated on stationary aircraft.


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    Titel :

    Interior noise levels of two propeller-driven light aircraft


    Beteiligte:
    Catherines, J. J. (Autor:in) / Mayes, W. H. (Autor:in)

    Erscheinungsdatum :

    01.07.1975


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Interior noise levels of two propeller driven light aircraft

    Catherines, J. J. / Mayes, W. H. | NTRS | 1975


    Interior Noise Levels of Two Propeller-Driven Light Aircraft

    J. J. Catherines / W. H. Mayes | NTIS | 1975


    Prediction of the interior noise levels of high-speed propeller-driven aircraft

    Rennison, D.C. / Wilby, J.F. / Wilby, E.G. | Tema Archiv | 1980


    Prediction of the interior noise levels of high-speed propeller-driven aircraft

    Rennison, D. C. / Wilby, J. F. / Wilby, E. G. | NTRS | 1980