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World's quietest room absorbs all sound
Wednesday April 04, 2012 07:43:17 PM,
IANS
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Washington: The
Anechoic Chamber in the US is the world's quietest room where
sound doesn't bounce off the walls the way it does in a regular
room.
The room is located in Orfield Laboratories in Minneapolis.
The recording studios where "Funkytown", a 1980 disco hit song by
the band Lipps Inc., and Bob Dylan's "Blood on the Tracks" were
recorded are also in this building.
A typical quiet room you sleep in at night measures about 30
decibels. A normal conversation is about 60 decibels. This room
has been measured at -9 decibels, the Minnesota Public Radio
reported.
Orfield Labs uses the room to test products, including switches
that go on car dashboards and the sound an LED display makes on a
cell phone to make sure they're not too loud.
To get into the Anechoic Chamber, which holds a Guinness World
Record, you go through two bank vault-like doors. The floor in the
room is mesh like a trampoline so there's nothing on the floor for
the sound to bounce off of. The walls are lined with
sound-proofing wedges that are a meter long so they absorb the
sound.
"When you sit in any rooms a person normally sits in, you hear the
sound and all its reflections," said Steven Orfield, president of
Orfield Labs.
"When you go into an Anechoic Chamber, there are zero reflections.
So if you listen to me talk and hear my voice, you're hearing my
voice exactly. And if I turn around and talk, the only thing
you'll hear is the sound bending around my head," the Minnesota
radio quoted him as saying.
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