How to make FM radio Noise Limiter | FM radio യിലെ Noise ഒഴിവാക്കാൻ ഒരു circuit | Squelch circuit

what is squelch circuit?
In telecommunications, squelch is a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a strong input signal.[1] Essentially, squelch is a specialized type of noise gate designed to suppress weak signals. Squelch is used in two-way radios and VHF/UHF radio scanners to eliminate the sound of noise when the radio is not receiving a desired transmission.
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Fm radio noise limiter
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