What is the purpose of a squelch in radio communications?

The purpose of a squelch in radio communications is to suppress output when the signal strength is low. Squelch serves an essential function by filtering out background noise and ensuring that the radio only produces sound when it receives a signal strong enough to warrant attention. This minimizes audible static and noise when there are no transmission signals present, allowing users to hear only the relevant communications.

By setting a squelch level, the user can determine the minimum signal strength necessary for audio output, providing a clearer listening experience. This feature is especially important in environments where many transmissions can occur simultaneously or where weak signals may introduce unnecessary interference.