[tayloramurphy]

What does a squelch switch do?

[etrautmann]

Squelch is a dial that changes a threshold below which analog radio signals are silenced so you can ignore noise. The dial allows you to dig into the noise when you want or be more conservative and only pass strong signals through.

[bruce343434]

Sets a minimum on the incoming signal to be amplified. For instance, only amplify stuff above x dB, silence stuff below x dB (noise).

[Aerroon]

A noise gate?

[polishdude20]

Silence