squelch unit?

[KA4HJH]

>"Squelch" is one of those words that gets thrown around quite a bit by the
>synth=paying crowd, but doesn't really have an accepted musical definition.
>In the world of shortwave radio and amatuer radio, "to squelch" means to
>attenuate unwanted noise.

In radio the term refers to a noise gate. Every two-way radio and receiver
has a threshold control labelled "squelch". Even with FM you'd be
perpetually awash in pink noise without it.

Terry Bowman, KA4HJH
"The Mac Doctor"