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'''Feedback''' describes the situation when output from (or [[information]] about the result of) an [[event]] or [[phenomenon]] in the past will influence the same event/phenomenon in the present or future. When an event is part of a chain of [[Causality|cause-and-effect]] that forms a [[circuit]] or loop, then the event is said to "feed back" into itself.
'''Feedback''' describes the situation when output from (or [[information]] about the result of) an [[event]] or [[phenomenon]] in the past will influence the same event/phenomenon in the present or future. When an event is part of a chain of [[Causality|cause-and-effect]] that forms a [[circuit]] or loop, then the event is said to "feed back" into itself.
*Feedback loop; the causal path that leads from the initial generation of the feedback signal to the subsequent modification of the event.
*Feedback loop; the causal path that leads from the initial generation of the feedback signal to the subsequent modification of the event.
*Audio feedback; the special kind of positive feedback which occurs when a loop exists between an audio input and output.
*Audio feedback; the special kind of positive feedback which occurs when a loop exists between an audio input and output.
==Overview==
==Overview==
Feedback is a [[mechanism]], [[process]] or [[signal]] that is looped back to control a [[system]] within itself. Such a loop is called a feedback loop. [[Intuitively]] many systems have an obvious input and output; feeding back part of the output so as to increase the input is positive feedback; feeding back part of the output in such a way as to partially oppose the input is negative feedback.
Feedback is a [[mechanism]], [[process]] or [[signal]] that is looped back to control a [[system]] within itself. Such a loop is called a feedback loop. [[Intuitively]] many systems have an obvious input and output; feeding back part of the output so as to increase the input is positive feedback; feeding back part of the output in such a way as to partially oppose the input is negative feedback.
