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Title:
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HUMAN PULSE WAVE MEASUREMENT BY MEMS-ECM SENSOR |
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Author(s):
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Shusaku Nomura, Masako Hasegawa-Ohira, Yasushi Hanasaka, Tadashi Ishiguro, Hiroshi Ogawa |
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ISBN:
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978-972-8939-52-6 |
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Editors:
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Katherine Blashki |
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Year:
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2011 |
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Edition:
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Single |
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Keywords:
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Pulse wave, MEMS, ECM, silicon microphone. |
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Type:
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Poster/Demonstration |
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First Page:
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486 |
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Last Page:
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488 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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A novel schema for human pulse wave measurement using millimeter-sized silicon microphone is proposed in this study. With regard to the microphone, an Electret Condenser Microphone (ECM) fabricated by Micro Electro Mechanical System (MEMS) technology was employed. We investigated the frequency characteristic of the MEMS-ECM to see if such small microphone originally designed to match the auditory frequency band had enough sensitivity in the lower frequency band at around 1.0Hz; this infrasonic sound is a dominant frequency of the human pulse wave generated pressure difference. As a result of sound sweeping assessment, it was found that the MEMS-EMC possessed a high sensitivity in the lower frequency band at around 1.0Hz even though the frequency characteristic was in the form of the differentiation circuit in such lower frequency band. Based on this result, we proposed possible variations of the pulse wave measurement introducing this MEMS-ECM. |
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