To provide an active noise reduction device that can inhibit the occurrence of a noise.SOLUTION: An active noise reduction device 10 reduces a noise in the interior space of a vehicle 50. The active noise reduction device 10 includes a control unit 20 that performs control to reduce a signal level of a cancellation signal when a signal level of a reference signal being input is lower than a threshold, and a threshold control unit 21 that changes a threshold based on a signal level of an error signal or information on the vehicle 50.SELECTED DRAWING: Figure 2

    【課題】異音の発生を抑制することができる能動騒音低減装置を提供する。【解決手段】能動騒音低減装置10は、車両50の車室内の騒音を低減する。能動騒音低減装置10は、入力された参照信号の信号レベルが閾値よりも低い場合に、キャンセル信号の信号レベルを低下させる制御を行う制御部20と、誤差信号の信号レベル、または、車両50に関する情報に基づいて閾値を変更する閾値制御部21とを備える。【選択図】図2


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    Title :

    ACTIVE NOISE REDUCTION DEVICE, VEHICLE AND ACTIVE NOISE REDUCTION METHOD


    Additional title:

    能動騒音低減装置、車両、及び、能動騒音低減方法


    Contributors:

    Publication date :

    2019-05-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES




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