What is feedback and how does it occur? Feedback occurs when the sound from the loudspeaker (or loudspeakers if a microphone is connected to more than one) is louder at the microphone than the sound of the voice. This fundamental fact is shown in the figure below. Note that in the diagram an L1 system is shown but the same fundamental fact is true for ANY loudspeaker. If you understand this diagram, it is relatively easy to understand how changes in an amplification system and room can...
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