This paper describes experimental studies of interior noise in a twin-engine, propeller-driven, light aircraft. An analytical model for this type of aircraft is also discussed. Results indicate that interior noise levels in this aircraft due to propeller noise can be reduced by reducing engine rpm at constant airspeed (about 3 dB), and by synchrophasing the twin engines/propellers (perhaps up to 12 dB). Ground tests show that the exterior noise pressure imposed on the fuselage consists of a complex combination of narrow-band harmonics due to propeller and engine exhaust sources. This noise is reduced by about 20-40 dB (depending on the frequency) by transmission through the sidewall to the cabin interior. The analytical model described uses modal methods and incorporates the flat-side geometrical and skin-stringer structural features of this light aircraft.


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    Titel :

    Investigation of interior noise in a twin-engine light aircraft


    Beteiligte:
    Mixson, J. S. (Autor:in) / Barton, C. K. (Autor:in) / Vaicaitis, R. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.04.1978


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Investigation of Interior Noise in a Twin-Engine Light Aircraft

    John S. Mixson / C. Kearney Barton / Rimas Vaicaitis | AIAA | 1978



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    Freier Zugriff