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Human Pulse Detection Using Multiple Silicon Microphones toward Estimation of Physical Condition

Author(s): Shusaku Nomura | Yasushi Hanasaka | Yuudai Katsuda | Ryoma Hirota | Takashi Ishiguro | Kantaro Takada | Masaru Uryu | Hiroshi Ogawa

Journal: Information Technology Journal
ISSN 1812-5638

Volume: 11;
Issue: 4;
Start page: 476;
Date: 2012;
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Keywords: electret condenser microphone | MEMS | autonomic nervous system | pulse wave | Silicon microphone

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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