09/02/2026
🤯 Come with me to the quietest room in the world.
🔊This is the Anechoic Chamber located deep inside of Microsoft’s headquarters, a few miles outside of Seattle.
🏆 In 2015, Microsoft earned the Guinness World Record for the quietest place on Earth at the time.
The room produced an average background level of -20.35 dBA. Yes… with A NEGATIVE SIGN.
🤓 Brief lesson on dee bee aye:
dBA stands for A-weighted decibels but for reference just know that…
🗣️ A normal conversation is about 60 dBA.
📖 A quiet library is about 30 dBA.
🫁 Human breathing is about 10 dBA.
👂 The threshold for human hearing is 0 dBA.
🎚️Microsoft’s chamber is about -20 dBA.
🫀That’s also why the chamber feels so strange. Once environmental sound disappears, extremely subtle sounds from your own body can become unusually noticeable… like breathing, your own heartbeat, crackling of joints, and food digesting in your stomach.
Sometimes causing people so much discomfort that they choose not to stay longer than 30 minutes (apparently).
👑In 2021, another research facility, Orfield Labs, dethroned them. Their room comes in at about -24 dBA.