Explanation

The quietest place on earth is an anechoic chamber at Orfield Laboratories in Minnesota. The space is so quiet that the longest anybody has been able to bear it was an entire 45 minutes. It is 99.99 percent sound absorbent and holds the Guinness World Record for the world’s quietest place. The inside of the small room is lined on all six sides with deep, fiberglass wedges, a double wall of insulated steel and foot-thick concrete.