Squelch
Squelch is a function in radio receivers and related equipment that mutes or reduces audio output when the received signal strength falls below a chosen threshold. The primary purpose is to suppress background noise or hiss when there is no meaningful transmission, making operation on shared channels more comfortable and practical.
Squelch can be implemented at different points in the signal chain. RF squelch decisions are based on
Squelch is widely used in two-way radios, scanners, citizen band radios, marine and aviation communication equipment,