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Heart-sound detecting apparatus and pulse-wave-propagation-velocity-relating-information obtaining system using the heart-sound detecting apparatus
Heart-sound detecting apparatus and pulse-wave-propagation-velocity-relating-information obtaining system using the heart-sound detecting apparatus
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机译:心音检测装置以及使用该心音检测装置的脉搏波传播速度相关信息获取系统
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摘要
A heart-sound detecting apparatus, including: a heart-sound microphone which detects a plurality of heart sounds produced by a heart of a living subject and outputs a heart-sound signal representative of the detected heart sounds; a smoothing device for smoothing, by differentiation, a waveform of the heart-sound signal output from the heart-sound microphone; a squaring device for squaring an amplitude of the smoothed waveform with respect to a base line of the heart-sound signal; and a start-point determining device for determining a start point of a first heart sound I as one of the detected heart sounds, based on that the squared amplitude is greater than a prescribed threshold value.
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