The worlds quietest room. Scientists at Minneapolis’ Orfield Labs created their own soundless room, an anechoic chamber. Their studies have found that when putting subjects within the chamber, they begin to hallucinate within 30 minutes.
Although extremely interesting, the experience is actually quite unpleasant. Not one subject has spent more than 45 minutes in the chamber alone. Leaving a person to only their thoughts, the chamber could drive them insane.