The quietest room in the world is the anechoic chamber at Orfield Laboratories in Minneapolis. One-foot-thick concrete walls and three-foot-thick fiberglass acoustic wedges absorb 99.99 percent of sound. Background noise measures −9.4 decibels.24 All you hear in an anechoic chamber is the sound of your heart beating, blood circulating, and lungs breathing. That’s the sound of silence, and it reminds us that it’s in God that “we live and move and have our being.”25
