The quietest room in the world is found at Orfield Laboratories in Minneapolis, USA, known as the anechoic chamber. It holds the Guinness World Record for being the most silent place on Earth, with a background noise level measured at –9.4 decibels (dBA). The chamber is built with sound-absorbing wedges on the walls, ceiling, and floor, completely eliminating echoes and blocking out all outside noise. Inside this room, silence becomes so intense that people can hear their own heartbeat, lungs, a