To provide a noise reduction system for an outboard motor and a noise reduction system for a vessel propulsion machine capable of simply reducing noise.SOLUTION: A noise reduction system for an outboard motor is the noise reduction systems for a plurality of outboard motors attached to a hull, in which the plurality of outboard motors include respective driving sources; the driving sources include rotary bodies; the noise reduction system includes a controller for controlling rotational phase of at least one rotary body of the driving sources; and the controller varies the phase of second noise so that the first noise due to rotation of rotary bodies of other driving sources is cancelled by the second noise due to rotation of rotary bodies of at least one driving source.SELECTED DRAWING: Figure 7

    【課題】騒音を手軽に低減することができる船外機の騒音低減システム及び船舶推進機の騒音低減システムを提供する。【解決手段】船外機の騒音低減システムは、船体に取り付けられる複数の船外機の騒音低減システムであって、複数の船外機はそれぞれ駆動源を備え、駆動源は回転体を有し、少なくとも1つの駆動源の回転体の回転位相を制御する制御部を備え、制御部は、他の駆動源の回転体の回転に起因する第1の騒音が、少なくとも1つの駆動源の回転体の回転に起因する第2の騒音によって相殺されるように、第2の騒音の位相を変化させる。【選択図】図7


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    Title :

    NOISE REDUCTION SYSTEM FOR OUTBOARD MOTOR AND NOISE REDUCTION SYSTEM FOR VESSEL PROPULSION MACHINE


    Additional title:

    船外機の騒音低減システム及び船舶推進機の騒音低減システム


    Contributors:

    Publication date :

    2021-05-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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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