To provide an active type noise reduction device capable of suppressing occurrence of abnormal noise due to disturbance.SOLUTION: An active type noise reduction device 11 includes: a canceling sound output device 13 for outputting canceling sound for canceling noise; noise signal generation devices 12 and 14 for generating noise signals on the basis of noise; and a controller 16 for controlling the canceling sound output device 13 on the basis of the noise signal. The controller 16 acquires buffer data in which the noise signals are accumulated in time series, generates a plurality of pieces of divided data by dividing buffer data, calculates a correlation value of buffer data on the basis of the plurality of pieces of divided data, detects presence or absence of disturbance mixed in the buffer data on the basis of the correlation value and switches control over the canceling sound output device 13 in accordance with the presence or absence of the disturbance mixed in the buffer data.SELECTED DRAWING: Figure 1
【課題】外乱による異音の発生を抑制することが可能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を出力する打消音出力装置13と、騒音に基づいて騒音信号を生成する騒音信号生成装置12、14と、騒音信号に基づいて打消音出力装置13を制御する制御装置16と、を備え、制御装置16は、騒音信号が時系列に蓄積されたバッファデータを取得し、バッファデータを分割することで複数の分割データを生成し、複数の分割データに基づいてバッファデータの相関値を算出し、相関値に基づいてバッファデータに混入する外乱の有無を検出し、バッファデータに混入する外乱の有無に応じて打消音出力装置13に対する制御を切り替える。【選択図】図1
ACTIVE TYPE NOISE REDUCTION DEVICE AND ACTIVE TYPE 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
11.10.2023
Patent
Elektronische Ressource
Japanisch
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