An analytical model based on modal analysis was developed to predict the noise transmission into a twin-engine light aircraft. The model was applied to optimize the interior noise to an A-weighted level of 85 dBA. To achieve the required noise attenuation, add-on treatments in the form of honeycomb panels, damping tapes, acoustic blankets, septum barriers and limp trim panels were added to the existing structure. The added weight of the noise control treatment is about 1.1 percent of the total gross take-off weight of the aircraft.


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    Title :

    Study of Cabin Noise Control for Twin Engine General Aviation Aircraft


    Contributors:
    R. Vaicaitis (author) / M. Slazak (author)

    Publication date :

    1982


    Size :

    147 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English