Abstract: A method for suppressing electroacoustic feedback in an audio system including a microphone that drives a loudspeaker system via an amplifier, in particular as part of a public address system, includes a) monitoring the level of the microphone signal on the microphone-amplifier path; b) determining the readiness for occurrence of feedback when the level of the microphone signal exceeds a threshold value; c) determining a critical frequency at which the level of the microphone signal exceeds the threshold value and interpreting this frequency as the feedback frequency; and d) filtering out the feedback frequency from the microphone signal to suppress the feedback; wherein the microphone signal is transformed from the time range to a frequency range by fast Fourier transform (FFT) before step a), and the frequency at which the maximum level of the microphone signal exceeds the threshold value in the form of a predetermined ratio of the maximum level of the microphone signal to the total level of the microphone