An automatic acoustic feedback suppression algorithm based on Zoom-FFT (ZFFT) was proposed. To improve the analysis precision of the acoustic feedback frequency
ZFFT
which can distinguish the components of the distinguishable feature frequency when the original frequency resolution is constant and the main lobe is not overlapped
is used to refine the spectrum. In the comparison experiments
the proposed algorithm can improve the analysis precision of the acoustic feedback frequency
effectively suppress the acoustic feedback and improve the voice quality.