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The World’s Quietest Room Is –24.9 Decibels — So Silent You Can Hear Your Blood Flowing
Hidden inside Orfield Laboratories in Minneapolis, USA, lies the world’s quietest place — an anechoic chamber so perfectly engineered that it holds the Guinness World Record for lowest ambient noise: –24.9 dB(A).
That’s below the threshold of human hearing. Even space, by comparison, has background radiation noise.
Step inside, and the sound of the outside world disappears. Instead, you begin to hear what’s usually masked — your heartbeat, blood circulation, even the faint motion of your lungs and joints.
How It Works:
The chamber is lined with 3.3-foot-deep fiberglass wedges that absorb 99.99% of sound waves.
The floor is a suspended mesh, preventing vibrations from traveling through the structure. It’s so isolated that even the air pressure feels “thick” and unnatural.
The Psychological Effect:
In normal environments, our brains use reflected sound to maintain balance and orientation.
Inside this chamber, there are no reflections — every movement feels wrong, your voice dies instantly, and after a few minutes, your mind starts to drift.
Some visitors report hallucinations, dizziness, or the sensation that their body is “floating.”
The longest anyone has ever lasted? About 55 minutes. Most step out in less than 30.
Fun Fact:
The chamber is used for precision testing — NASA uses similar setups to measure spacecraft noise levels and astronaut perception under extreme silence.
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Would you dare to face total silence?