Physiological sound examination device and physiological sound examination method

摘要

A physiological sound examination device which supports estimation of a state of a living body includes a first physiological sound measurement unit; a second physiological sound measurement unit; a power ratio calculation unit which calculates a power ratio which is a ratio of first physiological sound signal power to second physiological sound signal power; and an illness-related gain calculation unit which calculates a transfer-characteristic of the physiological sound in the living body by computing the power ratio. A power calculation unit which calculates first power which is the second physiological sound signal power in a first frequency band; and an illness-related high frequency power ratio calculation unit which calculates a sound-source-characteristic of the physiological sound by computing the first power. The computing is performed to reduce an influence of the respiratory flow velocity and/or the size of the living body.

主权项

1. A physiological sound examination device which supports estimation of a state of a living body by measuring a physiological sound which propagates through the living body and calculating a plurality of physiological sound characteristics, the physiological sound examination device comprising:
a hardware processor, wherein the hardware processor is configured to: calculate a power ratio which is a ratio of power of a first physiological sound signal to power of a second physiological sound signal, the first physiological sound signal being generated from a first physiological sound in a first portion of the living body and the second physiological sound signal being generated from a second physiological sound in a second portion of the living body; calculate, as one of the physiological sound characteristics, a transfer characteristic index of the physiological sound in the living body by performing a computation on the power ratio so that an influence of at least one of a respiratory flow velocity of the living body and a size of the living body is reduced; calculate first power which is power of the second physiological sound in a first frequency band: and calculate, as another one of the physiological sound characteristics, a sound source characteristic index of the physiological sound by performing a computation on the first power so that an influence of at least one of the respiratory flow velocity of the living body and the size of the living body is reduced.