With what seems like a constant need to chatter away on cellphones or listen to music with earbuds, a little quiet time may be in order. We’ve got the perfect place: the Guinness Book of World Records’s quietest room. It’s so quiet the longest anyone has been able to stand it before beginning to go a bit batty was 45 minutes — to be fair, part of that challenge was to remain in the dark too. The “anechoic chamber” at Orfield Laboratories in South Minneapolis is 99.9 percent sound absorbing. The Daily Mail reports the room is made with 3.3-foot-thick fiberglass acoustic wedges with walls made of insulated steel and a foot of concrete. An anechoic chamber in Minneapolis’s Orfield Laboratory holds the Guinness world record for the world’s quietest place at -9.4 decibels. As humans can only detect sounds above 0 decibels, the chamber is virtually soundless. Because the chamber is so soundless, NASA has conducted tests on its astronauts in there to simulate what it would sound like in space. Orfield said manufacturers, like Harley Davidson and Whirlpool, have also used the chamber to test how loud their products are or to evaluate sound quality.