So, if I’m in a call with someone, with the speaker on, why does the mic not receive the sound the phone is emitting?
In: Technology
the *simplest* method? you have one audio waveform from the speaker. you have a second from the microphone. you simply remove one from the other…
So the waveform being sent out, is what the microphone is hearing, with what the speaker is playing subtracted from it.
the speaker is playing the incoming wave form with what the microphone is hearing subtracted from it.
That’s why old Nokia phones had the microphone in the speaker cup.
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