Living body abnormality detection device, living body abnormality detection method, and program

A living body abnormality detection method performed by a living body abnormality detection device, the living body abnormality detection method comprising:

• a signal acquisition procedure in which the living body abnormality detection device acquires a first signal including a frequency component of heartbeat;
• a filter procedure in which the living body abnormality detection device attenuates a frequency component higher than the frequency component of heartbeat and a frequency component lower than the frequency component of heartbeat based on the first signal to generate a second signal;
• a frequency analysis procedure in which the living body abnormality detection device indicates an analysis result obtained by analyzing a frequency component of the second signal based on the second signal;
• an energy proportion calculation procedure in which the living body abnormality detection device calculates an energy proportion that is a proportion occupied by energy of a frequency component for each frequency band with respect to entire energy in the second signal based on the analysis result;
• a variance value calculation procedure in which the living body abnormality detection device calculates an energy variance value of a frequency component for each frequency band based on the analysis result;
• and
• a detection procedure in which the living body abnormality detection device at least detects abnormality or normality of a living body based on either one of the energy proportion and the variance value or both of the energy proportion and the variance value.