What's the History of the Arcade Instrument?

There's still plenty of astronomy to do in visible light. People are still doing it now. And the universe looks different at different spectra. You know, different things glow at different temperatures. Or they're very strong radio emitters, they're very quiet in the visible and so it's sort of like looking at the universe in color instead of in black and white. So that thate was a bit o hiss that he heard back then. But now we're hearing a roar, and its sort of unexplained. What's the history of this roar when wefirst startd listening to it or seeing it, and who did it?