Wave motion signal processing device, wave motion signal processing method, and recording medium

A wave motion signal processing method executed by a computer, the method comprising:

• generating a first spectrum with high resolution and a second spectrum with low resolution based on an input signal originating from a wave motion detected by at least one sensor;
• extracting, from the second spectrum, a first peak satisfying an extraction condition in a target time frame;
• tracking, in the first spectrum, a second peak satisfying the extraction condition with regard to a time frame following the target time frame from which the first peak was extracted;
• and
• generating a peak waveform, which is time-series data of a frequency including a plurality of second peaks, having the first peak as a starting end.

A non-transitionary recording medium having a program recorded therein that causes a computer to execute:

• a process of generating a first spectrum with high resolution and a second spectrum with low resolution based on an input signal originating from a wave motion detected by at least one sensor;
• a process of extracting, from the second spectrum, a first peak satisfying an extraction condition in a target time frame;
• a process of tracking, in the first spectrum, a second peak satisfying the extraction condition with regard to a time frame following the target time frame from which the first peak was extracted;
• and
• a process of generating a peak waveform, which is time-series data of a frequency including a plurality of second peaks, having the first peak as a starting end.