What is anty side tone circuit?

An anti-side tone circuit is a type of electronic circuit used in telecommunication systems to minimize or eliminate the echo or feedback of a user's voice that can be heard in their own earpiece during a call. This circuit works by detecting the side tone, which is the sound of the user's own voice transmitted back to them, and actively suppressing it. By reducing or canceling this side tone, the anti-side tone circuit enhances the clarity of the conversation and improves the overall user experience. These circuits are commonly found in handsets, headsets, and other telecommunication devices.