I'm currently learning about active noise cancellation for headphones. I was wondering if this technology is also used for video calls. During video calling I can't hear myself (that's good), but why not?
When I say something, this sound is picked up by my microphone. The sound is sent (after conversion to a digital form) via the internet to the person I am calling with. The sound then comes from his sound speaker and can be picked up again by his own microphone. This is then sent back via the internet to my loudspeaker, so I can hear my own voice again, an echo.
However, this doesn't happen: I don't hear myself talking. Why not? Is this active noise cancelling or is my reasoning above wrong? Or is the answer something completely different
Thank you in advance!