Hmm.
So , um , the , uh  the big arrays , uh , places , uh , like uh , Rutgers , and Brown , and other  other places , uh , they have , uh , big arrays with , I don't know , a hundred  hundred mikes or something.
Xerox.
And so there 's a wall of mikes. And you get really , really good beam - forming  with that sort of thing.