SOUND REINFORCEMENT SYSTEM HAVING AN MULTI MICROPHONE ECHO SUPPRESSOR AS POST PROCESSOR

摘要

A sound reinforcement system 1 comprises at least one microphone 2, adaptive echo compensation means 4 coupled to said microphone 2 for generating a microphone signal, and one or more loudspeakers 3 coupled to the EC means 4. In addition it comprises a dynamic echo suppressor 7 coupled between the adaptive EC means 4 and said at least one loudspeaker 3 for suppressing remaining echoes by using a time delay between the amplitudes of a microphones signal frequency component and the same remaining echo frequency component. Echo emanating from a room wherein the listener resides is effectively removed, and even a fine tuned model can effectively be made in cases wherein the speakers move. The sound reinforcement system 1, which may be a hands-free system is embodied as a public address system, a congress system, a conferencing system, or a communication system such as a passenger communication system for a vehicle such as a car, airplane or the like.