PROBLEM TO BE SOLVED: To effectively acquire biological information from signals containing noise.SOLUTION: The signal processing system 50 processing signals from an external auditory canal pressure sensor 16 including noise and specific oscillatory waveform includes: an external auditory canal pressure sensor interface 53 acquiring signals of the external auditory canal pressure sensor 16 a memory 52 storing base oscillatory waveform group data 55 including a plurality of reference oscillatory waveforms different in period or vibration phase and a CPU 51 computing each correlation between each reference oscillatory waveform of the base oscillatory waveform group data 55 stored in the memory 52 and signals from the external auditory canal pressure sensor 16, determining a maximum correlation reference oscillatory waveform in which the computed correlation is maximum, and generating an approximate waveform of a specific oscillatory waveform based on the maximum correlation reference oscillatory waveform.COPYRIGHT: (C)2012,JPO&INPIT【課題】ノイズを含む信号から生体情報を効果的に取得する。【解決手段】ノイズと特定の振動波形とを含む外耳道圧センサ16からの信号を処理する信号処理システム50であって、外耳道圧センサ16の信号を取得する外耳道圧センサインターフェース53と、周期又は振動の位相が異なる複数の基準振動波形を含む母振動波形群データ55を格納するメモリ52と、メモリ52に格納した母振動波形群データ55の各基準振動波形と外耳道圧センサ16からの信号との各相関を計算し、計算した相関が最大となる最大相関基準振動波形を決定し、最大相関基準振動波形に基づいて特定の振動波形の近似波形を生成するCPU51を有する。【選択図】図1
