Method for suppressing feedback in the case of hall or large-field audio systems and circuit arrangement for carrying out the method

摘要

In an audio system having an adaptively controllable compander and a microphone picking up interfering noise, the signals of which are used for controlling the characteristic of the compander (3) in order to suppress feedback effects, several microphones (Mi) are installed at a distance from the speaker or transmitting microphone (M1) at locations at which a higher sound pressure occurs or can be expected due to direct radiation, reflection, interference or room resonances or echoes and the compander characteristic is displaced in the direction of higher attenuation in dependence on the microphone signal level (ni) of the microphones (Mi). <IMAGE>