On a MacBook, I can be in a Zoom Meeting and speak into the MacBook Mic, while also listening to the meeting via the MacBook speakers. How is it possible for the mic to only receive my voice (and not also the sound of the meeting coming out of the speakers)?
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Echo cancellation processing my friend. It’s magic. The computer at the far end is actually the one doing the work for you while your computer is doing the work for the person your on a call with. And so the end result is a solution for both parties.
The audio passing to your speaker is used as a reference and digitally removed if it is detected in your mic feed so the far end does not hear themselves back. The way this algo works is beyond me but I bet someone here will explain it in simple terms. If I had to guess the audio would be inverted and the two waves would the be added together. This creates a canceling effect.
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