A noisy environment dominated by low frequency noise can often be improved through the use of active noise control. This situation arises naturally in propeller aircraft where the propellers induce periodic low frequency noise inside the cabin. The cabin noise is typically rather high, and the passenger flight comfort could be improved considerably if this level were significantly reduced. This paper discusses the operation and robustness of a narrowband feedforward active noise control system in a practical installation. The ANC system used 8 control sources and 11 control microphones, and the control algorithm was the multi-reference actuator-individual normalized filtered-x least mean squares algorithm. The experiment was performed in a full-scale fuselage section of a SAAB 340 aircraft. To produce the propeller noise, loudspeakers mounted in a ring around the fuselage were used. Results are presented from a series of experiments on the active control of propeller-induced cabin noise. Among the ``flight" conditions evaluated were: conditions where the ``propellers" were completely synchronized, and conditions with constant as well as time-varying frequency beat between ``left and right propellers."


    Access

    Download


    Export, share and cite



    Title :

    Experimental Performance Evaluation of a Multi-Reference Algorithm for Active Control of Propeller-Induced Cabin Noise


    Contributors:

    Publication date :

    2000-01-01


    Remarks:

    Local oai:bth.se:forskinfo025458003839E7DAC12569D200486A61


    Type of media :

    Paper


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629



    In-flight experiments on the active control of propeller-induced cabin noise

    ELLIOTT, S. / NELSON, P. / STOTHERS, I. et al. | AIAA | 1989


    Propeller Driven Aircraft Cabin Noise Reduction

    Florentin, C. I. / Chow, L. C. / Confederation of European Aerospace Societies| AIAA | British Library Conference Proceedings | 1995


    A Novel Multiple-Reference Algorithm for Active Control of Propeller-Induced Noise in Aircraft Cabins

    Johansson, Sven / Nordebo, Sven / Sjösten, Per et al. | BASE | 2000

    Free access

    Fokker's Activities in Cabin Noise Control for Propeller Aircraft

    Kaptein, D. / Waterman, E. H. / Sarin, S. L. | SAE Technical Papers | 1983


    Influence of propeller synchrophasing on aircraft cabin noise

    Sanderson, G.E. | Engineering Index Backfile | 1955