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Title:
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MULTIPLE PULSE WAVE MEASUREMENT TOWARD ESTIMATING CONDITION OF HUMAN ARTERIES |
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Author(s):
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Shusaku Nomura, Yasushi Hanasaka, Hiroshi Ogawa |
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ISBN:
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978-972-8939-87-8 |
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Editors:
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Mário Macedo |
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Year:
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2013 |
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Edition:
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Single |
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Keywords:
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Pulse wave, Silicon microphone, Artery, Autonomous System Activity, Healthcare device |
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Type:
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Full Paper |
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First Page:
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29 |
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Last Page:
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36 |
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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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The human pulse wave conveys clinically significant information related to the symptoms of cardiovascular diseases. The use of a photoplethysmograph (PPG) is a conventional means of detecting the human pulse. However, the locations where a PPG can be applied are quite limited, such as an ear lobe or the fingertip, thus limiting the application of the PPG for healthcare use. In this study, we propose a new pulse-sensing apparatus that employs multiple silicon microphone sensors, which provide physiologically rich information regarding the body, such as the condition of the arteries and activity of the autonomic nervous system. The silicon microphone is an electret condenser microphone fabricated using a microelectromechanical system (MEMS-ECM). Because it is not a mere microphone, but rather, a pressure sensor that possesses a wide range of frequency response, it can detect the human pulse wave, which has a dominant frequency of 1.4 Hz. By installing MEMS-ECMs on the surface of the skin surrounding the upper arm, we successfully demonstrated that these semiconductor sensors are sensitive enough to determine the rate of pulse propagation, which represents the stiffness of the arteries and activity of the autonomic nervous system. |
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