To provide an active noise control device that is capable of reducing noise even when a transfer characteristic changes.SOLUTION: An active noise control device 10 includes a secondary path filter coefficient updating unit 40. The secondary path filter coefficient updating unit 40 updates a coefficient of a secondary path filter by using a coefficient of the secondary path filter after previous updating as a previous value in a case in which it is determined that a phase characteristic of the secondary path filter when an initial value is used and a phase characteristic of the secondary path filter when the previous value is used are not approximate to each other.SELECTED DRAWING: Figure 3
【課題】伝達特性が変化しても騒音を低減できる能動騒音制御装置を提供する。【解決手段】能動騒音制御装置10は、二次経路フィルタ係数更新部40を有し、二次経路フィルタ係数更新部40は、初期値使用時の二次経路フィルタの位相特性と、前回値使用時の二次経路フィルタの位相特性とが近接しないと判定した場合には、前回の更新後の二次経路フィルタの係数を前回値として用いて二次経路フィルタの係数の更新を行う。【選択図】図3
ACTIVE NOISE CONTROL DEVICE
能動騒音制御装置
2022-08-03
Patent
Electronic Resource
Japanese
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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