Fish identification method and system based on psychoacoustics parameters

The invention relates to a fish identification method and system based on psychoacoustics parameters. The method is an identification strategy based on an active acoustics method, and specifically comprises: step 101) transmitting a sound signal to an underwater fish body, and acquiring a backscatter echo signal of the underwater fish body; step 102) carrying out filtering and amplitude normalization pretreatments for the fish body echo signal; step 103) extracting characteristics from the pretreated echo signal, and the specific method is as follows: carrying out frequency shifting for the pretreated echo signal, and shifting the frequency into a human audible frequency range, then dividing the frequency-shifted signal into a plurality of frequency bands according to a human auditory model, calculating specific loudness of various frequency bands, and taking the specific loudness as characteristic quantities; step 104) inputting the characteristic quantities to a classifier, classifying, and finishing species identification of the underwater fish body.