PROBLEM TO BE SOLVED: To shorten the measurement time while removing the disturbing magnetic field data from the measurement data of the magnetic field data and extracting the magnetic field data of interest. A signal processing device has a measurement execution unit that acquires measurement data including a signal of interest and an interfering signal generated in the vicinity of a signal source of the signal of interest, and the object of interest based on the measurement data. Generated from the signal source of the interference signal based on the signal source estimation unit that estimates the signal source in the extraction target region including the signal source of the signal and the signal source of the interference signal and the estimation result of the signal source by the signal source estimation unit. It has an interference signal source extraction unit that extracts interference signal data, and a target signal extraction unit that extracts an interest target signal by removing a common portion between the measurement data acquired by the measurement execution unit and the interference signal data. .. [Selection diagram] Fig. 1【課題】磁場データの計測データから妨害磁場データを除去して関心対象の磁場データを抽出しつつ、計測時間を短縮する。【解決手段】信号処理装置は、関心対象信号と、前記関心対象信号の信号源の近傍で発生する妨害信号とを含む計測データを取得する計測実行部と、前記計測データに基づいて前記関心対象信号の信号源と前記妨害信号の信号源とを含む抽出対象領域において信号源を推定する信号源推定部と、前記信号源推定部による信号源の推定結果に基づき前記妨害信号の信号源から発生する妨害信号データを抽出する妨害信号源抽出部と、前記計測実行部により取得した計測データと前記妨害信号データとの共通部分を除去することで関心対象信号を抽出する対象信号抽出部とを有する。【選択図】 図１
