This room is 99.99% quiet but can you stand it? (pics and video)

The quietest room on Earth at Ofrield Laboratories in South Minneapolis is called the 'anechoic chamber' because no sound is echoed in this chamber.

It's 99.99 percent sound absorbent and if you stay there too long you may start hallucinating. Indeed, the longest that anyone has survived in it is just 45 minutes.

Steven Orfield, the company's founder and president, explained that the room is so silent that whoever goes becomes the sound of the area. "When it's quiet, ears will adapt. The quieter the room, the more things you hear. You'll hear your heart beating, sometimes you can hear your lungs, hear your stomach gurgling loudly", he adds.