Howling detection and suppression method

The invention discloses a howling detection and suppression method, which is characterized by carrying out short-time Fourier transform on the acquired voice signal frame, so that the amplitude spectrum of each voice signal frame is calculated; obtaining a frequency point and a frequency value corresponding to each frame of peak value according to each amplitude spectrum; calculating and determining decibel values corresponding to the peak values and inter-frame peak value continuous stability respectively; comparing the obtained continuous stability of each inter-frame peak value with a preset threshold value, and screening the peak values meeting the requirement as candidate howling points; respectively calculating and determining an adjacent peak power ratio, a harmonic power ratio andan inter-frame amplitude spectrum slope deviation corresponding to each candidate howling point; and performing linear combination according to the adjacent peak power ratio, the harmonic power ratioand the inter-frame amplit