Earlier quoted context omitted.
> is done using dedicated hardware afaik. Agree with the first part of your answer, but not sure what you mean by this second part. There is dedicated hardware for it, then there are solution using your generic gpu (ex Nvidia RTX Voice), then there are solution using your generic cpu (ex whatever the name of the one discord desktop client provides).
I meant circuits specifically designed for noise cancellation. like in headphones
https://shop.asus.com/us/90yh02l1-b2ua00-ai-noise-canceling-...