But even if they had time to look it up, which they didn't, the contestant couldn't hear them in a soundproof booth.
"The Electronic Mind Reader"
John Blaine
"It wouldn't matter about the soundproof booth," Scotty chimed in, "because radio will go right through the walls!"
"The Electronic Mind Reader"
John Blaine
As a necessary adjustment to their environment, her nerves had become soundproof.
"Calvary Alley"
Alice Hegan Rice