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Q912938
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Inside the world's quietest room
If you stand in it for long enough, you start to hear
your heartbeat. A ringing in your ears becomes
deafening. When you move, your bones make a
grinding noise. Eventually you lose your balance,
because the absolute lack of reverberation
sabotages your spatial awareness.
In this room at Microsoft's headquarters in
Redmond, Washington, all sound from the outside
world is locked out and any sound produced
inside is stopped cold. It's called an anechoic
chamber, because it creates no echo at all — which
makes the sound of clapping hands downright
eerie.
The background noise in the room is so low that it
approaches the lowest threshold theorized by
mathematicians, the absolute zero of sound — the
next step down is a vacuum, or the absence of
sound.
This is the world's quietest place.
Deafening silence
The room offers a very rare sensorial experience.
As soon as one enters the room, one immediately
feels a strange and unique sensation which is hard
to describe, wrote Hundraj Gopal, a speech and
hearing scientist and the principal designer of
the anechoic chamber at Microsoft, in an email.
Most people find the absence of sound deafening, feel
a sense of fullness in the ears, or some ringing. Very
____ sounds become clearly audible because the
ambient noise is exceptionally low. When you turn
your head, you can hear that motion. You can hear
yourself breathing and it sounds somewhat loud,
he said.
In the real world, Gopal explained, our ears are
constantly subject to some level of sound, so there
is always some air pressure on the ear drums. But
upon entering the anechoic room this constant air
pressure is gone, since there are no sound
reflections from the surrounding walls.
This is a novel experience, he wrote. [...]
Jacopo Prisco, CNN
Disponível em: <https://edition.cnn.com/style/article/ anechoic-chamber-worlds-quietest-room/index.html>. Acesso em: 29 mar. 2018.
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