Wave analysis manner and wave analysis device

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for waveform analysis which can speed up a waveform analysis according to variation characteristics of the object waveform to be analyzed. SOLUTION: At an analysis point A, a short-time Fourier transformation part 2 makes a frequency analysis. A analysis-point temporary determination part 6 advances the analysis point and the short-time Fourier transformation part 2 makes a frequency analysis again. An analytic value prediction part 3 predicts phase data at an analysis point B by using previously analyzed frequency data and phase data. A comparison part 4 compares respective spectrum components with each other as to whether or not the error between the predicted value and the measured value is within a permissible range. When the totalized errors are within the permissible range, the analysis point B is determined as a next analysis point and when not, an intermediate analysis point B1 is determined as a next analysis point which is temporarily determined again.