A rotor blade noise reduction system includes: a plurality of rotor blades; a plurality of first speakers disposed equidistantly on a first circumference which is opposed to one surface of a rotor blade plane; a plurality of second speakers disposed equidistantly on a second circumference which is opposed to the other surface of the rotor blade plane; at least one evaluation microphone configured to acquire noise generated from the rotating rotor blades and control sound generated from the first speakers and the second speakers; and an active sound suppression processor configured to input a plurality of first delay control signals corresponding to the first speakers, and to input a plurality of second delay control signals corresponding to the second speakers.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Rotor blade noise reduction system, flying object and noise reduction system


    Beteiligte:
    GOTO TATSUHIKO (Autor:in) / ENAMITO AKIHIKO (Autor:in)

    Erscheinungsdatum :

    11.02.2020


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B64C AEROPLANES , Flugzeuge / F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



    ROTOR BLADE NOISE REDUCTION SYSTEM, FL YING OBJECT AND NOISE REDUCTION SYSTEM

    GOTO TATSUHIKO / ENAMITO AKIHIKO | Europäisches Patentamt | 2019

    Freier Zugriff

    Blade noise reduction method, blade tip assembly, rotor wing and rotor wing aircraft

    DING YAN / CHEN XI / ZHAO QIJUN et al. | Europäisches Patentamt | 2024

    Freier Zugriff


    AIRPLANE HAVING BLADE SYSTEM ALLOWING ROTOR BLADE FLYING AND FIXED BLADE FLYING

    ISHIGURO YASUO | Europäisches Patentamt | 2018

    Freier Zugriff

    BLADE/STATOR BLADE INTERFERENCE NOISE REDUCTION SYSTEM AND FLIGHT BODY

    GOTO TATSUHIKO / EBATO AKIHIKO | Europäisches Patentamt | 2019

    Freier Zugriff