To provide an active noise cancellation device for easily reducing a noise in a wide frequency band.SOLUTION: A composite sound of a generated sound by a main speaker and a generated sound by a sub-speaker hardly causes a mutual enhancement of a noise and the generated sounds near 100 Hz. When noise cancel is performed by the main speaker, in a frequency band in which the noise and the generated sound by the main speaker enhance each other, by cancelling the generated sound by the main speaker using the sub-speaker, the mutual enhancement of the noise and the generated sounds is suppressed and the noise can be easily reduced in a wide frequency band.SELECTED DRAWING: Figure 11

    【課題】広範な周波数帯域においてノイズを低減しやすいアクティブノイズキャンセル装置を提供する。【解決手段】メインスピーカの発生音とサブスピーカの発生音との合成音は、100Hz近傍においてノイズと発生音との強め合いが生じにくくなっている。メインスピーカによってノイズキャンセルする場合に、ノイズとメインスピーカの発生音とが強め合ってしまう周波数帯域において、メインスピーカの発生音をサブスピーカによってキャンセルすることにより、ノイズと発生音との強め合いを抑制し、広範な周波数帯域においてノイズを低減しやすくすることができる。【選択図】図11


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    Title :

    ACTIVE NOISE CANCELLATION DEVICE


    Additional title:

    アクティブノイズキャンセル装置


    Contributors:

    Publication date :

    2019-04-25


    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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