Abstract: In this disclosure, at heartbeat detection, a frequency component caused by a micro vibration of heartbeat is extracted over a predefined heartbeat observation time window, an amplitude peak is extracted from the frequency component caused by the micro vibration of the heartbeat, and one characteristic micro vibration out of a plurality of characteristic micro vibrations in one heartbeat is extracted. On the other hand, at respiration detection, positive and negative frequency components caused by the micro vibration of the heartbeat are extracted, complex multiplication of the positive and negative frequency components is performed, and from complex multiplication of the positive and negative frequency components, a respiration phase change caused by a micro vibration of respiration is extracted, with a heartbeat phase change caused by the micro vibration of the heartbeat removed.

Abstract: A heartbeat/respiration output device that includes a heartbeat/respiration extraction unit that extracts a frequency component caused by a micro vibration of heartbeat and/or respiration from a radar signal or an ultrasound signal reflecting off a body surface of a patient, a temporal change calculation unit that calculates an amplitude temporal change or a phase temporal change of the frequency component caused by a micro vibration of heartbeat and/or respiration, a sound signal modulation unit that performs amplitude modulation or frequency modulation on a sound signal having an audible band frequency based on the amplitude temporal change or the phase temporal change of the frequency component caused by a micro vibration of heartbeat and/or respiration, and a heartbeat/respiration output unit that outputs the sound signal after amplitude modulation or frequency modulation.