Alternative term: Squelch (U.S.A.)
1. The process of inhibiting, by an automatic device incorporated in a receiver, any response (usually acoustic) to an excitation of less than some predetermined magnitude or any response with a signal-to-noise ratio below some predetermined value.
Note: The term Noise suppression for this process is deprecated.
2. Automatically making a receiver insensitive when a neighbouring transmitter is working.
Note: This process is often termed Desensitising.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Centre of buoyancy
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM