squelch -
To suppress the unwanted hiss or static between received transmissions by adjusting the gain of your receiver.
squelch -
To make a sucking, splashing noise as when walking on muddy ground.
squelch -
To walk or step through a substance such as mud.
Wikipedia
Squelch is a circuit function that acts to suppress the audio output of a receiver in the absence of a sufficiently strong desired input signal. Squelch excludes undesired lower-power input signals that may be present at or near the frequency of the desired signal. Squelch is a noise gate that only allows signals at a specified strength over a threshold to be played through the speaker.
