[Jxnathan]

For those wondering the definition of "squelch": make a soft sucking sound such as that made by walking heavily through mud.

[panarky]

That's one definition of "squelch". The title is probably using the definition that means "suppress":

  a circuit that suppresses the output of a radio receiver if the
  signal strength falls below a certain level.

https://www.google.com/search?q=define%3Asquelch

http://en.wikipedia.org/wiki/Squelch