Some gates do not actually shut off the sound, but they reduce it by some amount. These gates have an additional control to adjust how much reduction is used when the gate is closed. Generally, a noise gate is inserted into a problem channel and adjusted such that the threshold level is set to be above the background noise. The end result is silence from the channel when there is just background noise from the input, and the normal signal when a level higher than the threshold is present. Specifically, no warranty is expressed or implied regarding the accuracy of the information contained within.
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