Four-Day Planet by H. Beam Piper

There was dead silence for two or three seconds. If a kitten had sneezed, everybody would have heard it. Then it started, first an inarticulate roar, and then a babel of unprintabilities. I thought I'd heard some bad language from these same men in this room when Leo Belsher's announcement of the price cut had been telecast, but that was prayer meeting to this. Dad was still talking. At least, I saw his lips move in the screen.

"Say that again, Ralph," Oscar Fujisawa shouted.