The measurement and analysis procedures are documented, and the results of interior noise control ground tests conducted on a DC-9 aircraft test section are summarized. The objectives of these tests were to study the fuselage response characteristics of treated and untreated aircraft with aft-mount advanced turboprop engines and to analyze the effectiveness of selected noise control treatments in reducing passenger cabin noise on these aircraft. The results of fuselage structural mode surveys, cabin cavity surveys and sound intensity surveys are presented. The performance of various structural and cabin sidewall treatments is assessed, based on measurements of the resulting interior noise levels under simulated advanced turboprop excitation.


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    Title :

    Interior Noise Control Ground Test Studies for Advanced Turboprop Aircraft Applications


    Contributors:
    M. A. Simpson (author) / M. R. Cannon (author) / P. L. Burge (author) / R. P. Boyd (author)

    Publication date :

    1989


    Size :

    149 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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