Audio feedback
Audio feedback is typically unwanted noise that occurs when an audio system oscillates. It often happens when microphones are pointed at loudspeakers. There are ways to avoid or reduce feedback, such as with equalization or reducing the room's echo.
Audio Feedback Media
Block diagram of the signal-flow for a common feedback loop.:118
Electric guitarist Jimi Hendrix, pictured here in a 1967 concert, was an innovator in the use of guitar feedback effects.
The Boss DF-2 Super Feedbacker and Distortion pedal (on the left) helps electric guitarists to create feedback effects.
