A noise reduction system for a marine vessel having a plurality of marine propulsion devices including a first marine propulsion device and a second marine propulsion device, each of the plurality of marine propulsion devices including a drive source, each of the drive sources operating on a same principle as that of the other drive sources, and including a rotary member. The noise reduction system includes a controller configured to control rotation of the rotary member of the drive source in the second marine propulsion device, to thereby control a phase of a second noise caused thereby, such that a first noise caused by rotation of the rotary member of the drive source in the first marine propulsion device is canceled by the second noise.


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    Title :

    Noise reduction system for outboard motors and noise reduction system for marine propulsion devices


    Contributors:

    Publication date :

    2022-07-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / F02P IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES , Zündung von Brennkraftmaschinen mit innerer Verbrennung, ausgenommen Kompressionszündung





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