Laboratory tests have been performed to obtain transmission loss data for an aircraft cabin with Helmholtz resonators installed in the sidewalls, ceiling, and cabin floor, and to determine the effectiveness of resonator installation. It is shown that resonators installed within the sidewalls of an aircraft cabin can significantly reduce SPL values of the fundamental propfan blade passage frequency within the cabin. Resonator performance can be improved by maximizing resonator nozzle to sidewall spacing, and by avoiding noise flanking paths within the sidewall trim design.


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    Title :

    Laboratory testing of a high transmission loss aircraft cabin structure


    Contributors:

    Conference:

    NOISE-CON 90: National Conference on Noise Control Engineering ; 1990 ; Austin, TX, United States


    Publication date :

    1990-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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