OK.
So , echo cancelling is  is , you know , commonly done in telephony , and  and  and it 's sort of the obvious thing to do in this situation if you  if , you know , you 're gonna be talking some distance from a mike.
When uh , I would have meetings with the folks in Cambridge when I was at BBN over the phone , they had a um  some kind of a special speaker phone and when they would first connect me , it would come on and we 'd hear all this noise. And then it was uh  And then it would come on and it was very clear ,
Yeah.