To provide a noise removal device capable of preventing noise from being generated in stopping generation of a canceling sound.SOLUTION: A noise removal device comprises: a microphone 30 installed at a listening position of a user; a speaker 20 outputting a canceling sound; a controller 10 which performs adaptation processing so that power of an error signal output from the microphone 30 becomes minimum, and thus generates the canceling sound for canceling noise at the position of the microphone 30; a gain control part 22 which makes the canceling sound output from the speaker 20 gradually smaller; and a gain control part 32 which makes an error signal, output from the microphone 30 and input to the controller 10, gradually smaller.SELECTED DRAWING: Figure 1

    【課題】打消し音の生成を停止する際の異音の発生を防止することができるノイズ除去装置を提供すること。【解決手段】ノイズ除去装置は、利用者の聴取位置に設置されたマイクロホン30と、打消し音を出力するスピーカ20と、マイクロホン30から出力される誤差信号のパワーが最小となるように適応処理を行うことにより、マイクロホン30の位置におけるノイズを打ち消す打消し音を生成するコントローラ10と、スピーカ20から出力する打消し音を徐々に小さくするゲイン制御部22と、マイクロホン30から出力されてコントローラ10に入力される誤差信号を徐々に小さくするゲイン制御部32とを備えている。【選択図】図1


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    Title :

    NOISE REMOVAL DEVICE


    Additional title:

    ノイズ除去装置


    Contributors:
    YAMADA JOJI (author) / SUGAI TAKU (author) / SAITO NOZOMU (author)

    Publication date :

    2019-11-28


    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



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