Research on identification technology of ship radiated noise and marine biological noise

The vocal mechanism and structure of ship radiated noise and marine biological noise are analyzed, and the differences of short-term inter-frame spectral similarity between the two kinds of noise are compared. On the basis of this, Pearson correlation coefficient variance of the spectral trend of the adjacent two frames in the short term of the framing signal is used as the recognition feature. A signal recognition method based on the similarity of short-time spectrum is studied to classify and indentify ship radiated noise and marine biological noise. The two kinds of noise are indentified based on the measured ship radiated noise signal and marine biological noise signal. And the recognition result proves the effectiveness of the method.