Information Technology Journal 1812-5638 1812-5646 Asian Network for Scientific Information 10.3923/itj.2012.476.479 Nomura Shusaku Hanasaka Yasushi Katsuda Yuudai Hirota Ryoma Ishiguro Takashi Takada Kantaro Uryu Masaru Ogawa Hiroshi 4 2012 11 4 An Electret Condenser Microphone (ECM) fabricated by Micro Electro Mechanical System (MEMS) technology, or a silicon microphone chip, was integrated into a multiple sensor apparatus to detect human pulse wave toward estimation of physical condition of our body. Ten of MEMS-ECMs were placed at the forearm of a subject with multi-channel signal amplifier and recorder. As a developing result, it is successfully demonstrated that MEMS-ECM sensors are sensitive enough to detect human pulse wave. Moreover, it is suggested that an internal physical condition in relation to an activity of sympathetic/parasympathetic nervous system might be estimated by comparing pulse signals derived by this multiple MEMS-ECM sensors.

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