To provide an inexpensive active noise reduction system that can effectively reduce noise.SOLUTION: An active noise reduction system 11 includes: canceling sound output devices 12A-12D that output a canceling sound y for canceling noise; a plurality of noise microphones 13A-13E that generate a plurality of noise signals x on the basis of noise; and a controller 16 that controls the canceling sound output devices 12A-12D on the basis of the plurality of noise signals x. The controller 16 acquires the plurality of noise signals x output from the plurality of noise microphones 13A-13E, selects a reference signal r' corresponding to the noise and an error signal e' corresponding to an error between the noise and the canceling sound y from among the plurality of noise signals x, generate a correction reference signal r by removing a component of the canceling sound y from the reference signal r', and generates a control signal u for controlling the canceling sound output devices 12A-12D on the basis of the correction reference signal r.SELECTED DRAWING: Figure 2
【課題】騒音を効果的に低減することのできる安価な能動型騒音低減装置を提供する。【解決手段】能動型騒音低減装置11は、騒音を打ち消すための打消音yを出力する打消音出力装置12A-12Dと、騒音に基づいて複数の騒音信号xを生成する複数の騒音マイク13A-13Eと、複数の騒音信号xに基づいて打消音出力装置12A-12Dを制御する制御装置16と、を備え、制御装置16は、複数の騒音マイク13A-13Eから出力される複数の騒音信号xを取得し、複数の騒音信号xの中から、騒音に対応する参照信号r´と、騒音と打消音yとの誤差に対応する誤差信号e´と、を選択し、参照信号r´から打消音yの成分を除去することで補正参照信号rを生成し、補正参照信号rに基づいて、打消音出力装置12A-12Dを制御するための制御信号uを生成する。【選択図】図2
ACTIVE NOISE REDUCTION SYSTEM AND ACTIVE NOISE REDUCTION PROGRAM
能動型騒音低減装置及び能動型騒音低減プログラム
2023-10-11
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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