acoustic feedback

acoustic feedback

noun Electronics.
(in an audio system, especially a public-address system) the feedback of sound from a loudspeaker to a microphone, often resulting in a whistling noise caused by electrical oscillations.
Also called feedback.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To acoustic feedback

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Acoustic feedback is always a great word to know.
So is impedance. Does it mean:
total opposition to alternating current by an electric circuit
electric current that reverses direction at regular intervals
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