The Quietest Place on Earth Will Drive You Insane Within 45 Minutes

The quietest place on Earth is a room in Minneapolis, Minnesota, and the longest anyone has stayed in the dark there is 45 minutes. The 'anechoic chamber' at Orfield Laboratories absorbs over 99 percent of sound with 3-foot-thick fiberglass wedges and insulated walls, removing virtually every sound except that of people and objects brought into the chamber. In some cases, that's used for simple industrial purposes: it's a way to hear the sounds of switches, motors, or washing machines without outside interference