system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: As computers have both a microphone and speakers, how does it avoid triggering a feedback loop when both are in use?
gpt
Firstly, they put the microphones a reasonable distance from the speakers. And, secondly, they use various techniques to reduce this feedback. Sometimes they design directional microphones, but they require space that phone and computer designs can't provide. But they can include two microphones, and sound coming from different locations will arrive at different times.

Often they assume that the microphone will pick up audio from the speakers, so they just subtract the signals sent from the speakers from the sound picked up by the microphones.