how do microphones in a phone not pick up any audio that the speakers put out? if I put a call on speaker mode, how do people on the other end not hear themselves?
In: Technology
In modern Cellphones, they’ve taken to being half duplex, so while the speaker is outputting noise, the microphone is turned off, and when the microphone is listening, the speaker is cut. This is why you can’t talk over each other on a cellphone and still hear what the other person is saying like you could on analog phones years ago.
There might be some magic software or hardware witchery on some types of connection, but the cell companies are too cheap to put full duplex systems in for everyone.
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