The invention relates to a device for suppressing a feedback in an environment containing a microphone (10) and a loudspeaker (13), comprising a device (20), for embedding a test signal in a loudspeaker signal, a microphone signal, or a modified microphone signal, preferably using a psychoacoustic marking threshold by means of a pseudo-noise test signal, a device (50) for determining a property of a transmission path in the environment between the loudspeaker (13) and the microphone (10), using the embedded test signal and the microphone signal, a filter (40), for filtering the loudspeaker signal, to give a filtered loudspeaker signal, whereby the filter may be adjusted with regard to the filter characteristics thereof by the determining device (50) to match the same to the properties of the transmission path and a device (30) for subtracting the filtered loudspeaker signal from the microphone signal to give a modified microphone signal in which the feedback as a result of the loudspeaker is reduced. The feedback suppression concept achieves an effective feedback suppression without a loss in audio quality in particular without detracting from the artistic work of an artist.