[Vietsub] Inside the quietest room in the world, you can hear the sound of blood streaming on its head

Tram Ho

In 1969, Steve Orfield just graduated from college. He graduated and worked as a salesman for office furniture. At the time, working boxes separating people to keep the privacy of every office worker were becoming in vogue.

Orfield was commissioned to sell such a box, which was advertised as being completely off center. Outside people cannot overhear the phone conversation of the person sitting inside, or be annoyed by any annoying sounds coming from inside.

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Absolute sound absorption rooms have been cherished since the 1960s.

But it is only advertising. The box didn’t work as well. No one knows why its design failed, even the manufacturer couldn’t explain it. Orfield quit his job, and a few years later, he was found building a lab in Minneapolis.

Inside the Orfield Laboratory at Birghham Young University, the United States has a room that is known as the quietest room on Earth. Orfield has succeeded in creating a room that eliminates any sound emitted from it.

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Steve Orfield inside the quietest room on Earth he created.

But it was a treasure that Orfield could not sell to anyone, he turned it into a multidisciplinary research center, serving all the most sophisticated audio-related experiments.

Companies will bring their products here to test the noise they can make. And NASA has sent astronauts to help them adapt to the silence of space.

What will happen inside the quietest room in the world?

The room is called anechoic chamber, with anechoic in Latin meaning ” no echo ” – “no reflection” or “no echo “. It is essentially a chamber, inside a chamber, inside another chamber.

All its walls, floors and ceilings are lined with sponge-like fiberglass wedges nearly 100 cm thick. Next, the six sides of the chamber were covered with steel plates 10 cm thick. The outer layer is another layer of concrete 30 cm thick.

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Orfield says the quietest rooms you’ve ever entered, such as a bedroom with the lowest noise level, also fall to about 30 decibels. But the average noise level inside the Orfield Laboratory is only -13 decibels. That means the sound waves that exist in here are below the level of the human’s ear.

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This echo-free chamber is definitely the quietest place on Earth. And there are strange rumors about it. It is said that you cannot stand in it. When the light is turned off, and there is no sound around you, you will lose direction, dizziness and nausea.

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Some people believe they can go crazy in this room. By silence can also be like a form of torture. When no sounds are coming from outside, the only thing you can hear are sounds coming from your own body. It is the rustling of clothes, the sound of swallowing, breathing, heartbeat and even the sound of blood in the brain.

The record for a person who stays awake in this room is only 45 minutes. Is that true? Let’s find out in the video below:

Are you really crazy after 45 minutes in the quietest room on Earth?

See Popsci, Smithsonianmag

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Source : Genk