How does the phone distinguish the sound I am making from the phones own audio. And why, for example, can’t the receiver of the phone call hear when I listen to a YouTube video while talking to him?
In: 5
The phone knows what sound it’s making, and subtracts the sound it itself makes from the sound it sends over the wire (well, wireless, by now). This also is the mechanism that makes sure people don’t echo back if you have the speaker on when talking to someone.
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