There is concern that advanced turboprop engines currently being developed may produce excessive aircraft cabin noise level. This concern has stimulated renewed interest in developing aircraft interior noise reduction methods that do not significnatly increase take off weight. An existing analytical model for noise transmission into aircraft cabins was utilized to investigate the behavior of an improved propeller source model for use in aircraft interior noise studies. The new source model, a virtually rotating dipole, is shown to adequately match measured fuselage sound pressure distributions, including the correct phase relationships, for published data. The virtually rotating dipole is used to study the sensitivity of synchrophasing effectiveness to the fuselage sound pressure trace velocity distribution. Results of calculations are presented which reveal the importance of correctly modeling the surface pressure phase relations in synchrophasing and other aircraft interior noise studies.


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    Title :

    An improved source model for aircraft interior noise studies


    Contributors:

    Conference:

    Structures, Structural Dynamics, and Materials Conference ; 1985 ; Orlando, FL


    Publication date :

    1985-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Improved Source Model for Aircraft Interior Noise Studies

    J. R. Mahan / C. R. Fuller | NTIS | 1985



    An improved source model for aircraft interior noise studies

    Mahan, J. R. / Fuller, C. R. | NTRS | 1985


    Propeller aircraft interior noise model

    Pope, L. D. / Wilby, E. G. / Wilby, J. F. | NTRS | 1984


    Propeller Aircraft Interior Noise Model

    L. D. Pope / E. G. Wilby / J. F. Wilby | NTIS | 1984