Device and method for suppressing a feedback

An apparatus for suppressing feedback in an environment in which a microphone and a loudspeaker are located, comprising means for embedding a test signal into a loudspeaker signal, a microphone signal or a modified microphone signal preferably using a psychoacoustic marking threshold using a pseudo noise test signal means for determining a characteristic of a transmission channel in the environment between the loudspeaker and the microphone by using the embedded test signal and the microphone signal, a filter for filtering the loudspeaker signal to obtain a filtered loudspeaker signal, wherein the filter is adjustable with respect to to be its filter characteristic adjusted by the means for determining the transmission channel characteristic, and means for subtracting the filtered loudspeaker signal from the microphone signal to obtain the modified microphone signal wherein a feedback is reduced due to the loudspeaker signal. The feedback suppression concept creates no audio quality loss an effective feedback suppression, is not affected by the particularly also an artist in his artistic presentation.