An analytical model was developed to predict the noise levels inside propeller-driven aircraft during cruise at M = 0.8. The model was applied to three study aircraft with fuselages of different size (wide body, narrow body and small diameter) in order to determine the noise reductions required to achieve the goal of an A-weighted sound level which does not exceed 80 dB. The model was then used to determine noise control methods which could achieve the required noise reductions. Two classes of noise control treatments were investigated: add-on treatments which can be added to existing structures, and advanced concepts which would require changes to the fuselage primary structure. Only one treatment, a double wall with limp panel, provided the required noise reductions. Weight penalties associated with the treatment were estimated for the three study aircraft.


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    Title :

    Interior noise control prediction study for high-speed propeller-driven aircraft


    Contributors:

    Publication date :

    1979-09-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English


    Keywords :


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

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


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

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



    Noise control prediction for high-speed, propeller-driven aircraft

    WILBY, J. / RENNISON, D. / WILBY, E. et al. | AIAA | 1980


    Noise control prediction for high-speed, propeller-driven aircraft

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