 Adaptive feedback cancellation

Adaptive feedback cancellation (AFC) is a process used primarily in audio signal processing to eliminate or reduce feedback noise in audio systems, such as microphones and loudspeakers. Feedback occurs when the sound picked up by a microphone is amplified and then fed back into the microphone, creating a loop that can result in loud, disruptive sounds or a ringing effect. This is particularly common in environments like public speaking venues, hearing aids, and communication systems.