PROBLEM TO BE SOLVED: To provide a pulsation detector capable of easily measuring heart sound and pulse even in a state of moving relative to various sites of a subject.SOLUTION: A pulsation detector SNSR includes: a microphone 2 receiving sound pressure and converting it into an electric signal a casing 1 to which the microphone is attached and an air chamber 3 formed at a front side of the casing with it communicated with a sound pressure input surface of the microphone. The air chamber includes: a vibrating membrane 31 that is fixed to a peripheral edge part of the casing so as to include the microphone and whose outer surface can come into contact with a surface of a subject and support members 32-34 that three-dimensionally support the vibrating membrane with their engaged with the inner surface of the vibrating membrane so as to form an internal space, and form different-magnitude mechanical impedances against pressing force to the subject, at different sites of the vibrating film.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】被検体のさまざまな部位に対し動いている状態でも簡単に心音や脈拍などの測定を行うことができる拍動検出装置を提供する。【解決手段】拍動検出装置SNSRは、音圧を受けて電気信号に変換するマイクロホン2と、マイクロホンを取り付けたケーシング1と、マイクロホンの音圧入力面に連通させてケーシングの正面側に形成された空気室3と、を有する。空気室は、マイクロホンを内包するようにケーシングの周縁部に固定されていて外表面を被検体の表面に接触可能とする振動膜31と、振動膜の内表面に係合して内部空間を形成するように振動膜を立体的に支えると共に被検体への押圧力に抗する大小異なる機械インピーダンスを振動膜の異なる部位に形成する支持部材32~34と、を有する。【選択図】図2
