To provide a noise reduction system that uses speakers and microphones corresponding to respective seats of a vehicle to reduce noise at the respective seats, and that improves reduction effect on the noise while making outputs of speakers of seats where passengers are absent ineffective.SOLUTION: A noise reduction device is configured to use speakers and microphones corresponding to respective seats of a vehicle to reduce noise at each seat, and has: a signal processing part which uses a set auxiliary filter to generate a cancel sound to reduce noise at the positions of the ears of a passenger on a predetermined seat; an operation setting part which sets ineffective operations of speakers and microphones corresponding to seats where passengers are absent among the seats of the vehicle; and an auxiliary filter setting part which changes, according to the number of passengers on other seats affecting the noise at the predetermined seat, a set value of an auxiliary filter that the signal processing part uses to generate the cancel sound.SELECTED DRAWING: Figure 4

    【課題】車両の各座席に対応するスピーカ及びマイクを用いて各座席の騒音を低減する騒音低減システムにおいて、乗員がいない座席のスピーカの出力を無効にしつつ、騒音の低減効果を向上させる。【解決手段】騒音低減装置は、車両の各座席に対応するスピーカ及びマイクを用いて、座席ごとに騒音を低減する騒音低減装置であって、設定された補助フィルタを用いて、所定の座席における乗員の耳の位置で騒音を低減するキャンセル音を生成する信号処理部と、前記車両の座席のうち、乗員がいない座席に対応するスピーカ及びマイクの動作を無効に設定する動作設定部と、前記所定の座席の騒音に影響を与える他の座席における乗員の数に応じて、前記信号処理部が前記キャンセル音の生成に用いる補助フィルタの設定値を変更する補助フィルタ設定部と、を有する。【選択図】図4


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    Title :

    NOISE REDUCTION DEVICE, VEHICLE, NOISE REDUCTION SYSTEM, AND NOISE REDUCTION METHOD


    Additional title:

    騒音低減装置、車両、騒音低減システム、及び騒音低減方法


    Contributors:
    TAJI RYOSUKE (author) / TANNO KEITA (author) / ISAMI MONE (author) / ITO AKIRA (author) / UESUGI HARUKI (author)

    Publication date :

    2021-02-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler



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