To provide a noise reduction device and a noise reduction system that can accurately and speedily acquire an acoustic transmission function with a seat placed in an actually used state.SOLUTION: A system management device 501 gives notice to let a seat part drive a seat. A seat detector 582 detects a seat position being in an actually used state, a control speaker 340 outputs white noise that a white noise generator 337 generates, and an error microphone 350 detects the white noise so as to identify an acoustic transmission function including the path from the control speaker 340 to the error microphone 350. Further, the system management device 501 informs an identification control part 538 of the acoustic transmission function and an initial value of a filter coefficient.SELECTED DRAWING: Figure 19

    【課題】座席シートを実使用状態にして正確かつ迅速に音響伝達関数を求めることができる騒音低減装置及び騒音低減システムを提供する。【解決手段】システム管理装置501は座席へシートを駆動させるよう通知する。シート検知器582はシート位置が実使用状態であることを検知して、制御スピーカ340は、ホワイトノイズ発生器337が発生したホワイトノイズを出力し、このホワイトノイズを誤差マイク350で検知することにより、制御スピーカ340から誤差マイク350までの経路を含む音響伝達関数を同定する。また、システム管理装置501は、音響伝達関数やフィルタ係数の初期値を同定制御部538へ通知する。【選択図】図19


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    Title :

    NOISE REDUCTION DEVICE AND NOISE REDUCTION SYSTEM


    Additional title:

    騒音低減装置および騒音低減システム


    Contributors:

    Publication date :

    2019-09-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler



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