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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The Distance between the microphone and the speaker is constant, and the speed of sound through all relevant media is also known, *and* the sound is known.
You can use that to know exactly when feedback from the speakers should hit the microphone, and remove it.
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