Audio signal processing method and audio signal processing device

An audio signal processing method includes: obtaining an audio frequency spectrum of an acoustic wave; determining a target frequency corresponding to a target acoustic pressure value higher than an acoustic pressure threshold value in the audio frequency spectrum; obtaining a frequency range corresponding to the target frequency and including an upper-frequency limit and a lower-frequency limit; determining whether a first acoustic pressure difference corresponding to the target frequency and the upper-frequency limit and a second acoustic pressure difference corresponding to the target frequency and the lower-frequency limit are greater than an acoustic pressure difference threshold value or not; recording the target frequency as an abnormal frequency when determining the first acoustic pressure difference and the second acoustic pressure difference are greater than the acoustic pressure difference threshold value; filtering the acoustic wave according to the abnormal frequency and a preset bandwidth.