Microsoft now holds the Guinness World Record for Quietest Place on Earth.  You might think that a library reading room or well-insulated basement is a quiet place, but compared to the anechoic chamber in Microsoft’s audio lab, they’re about as quiet as a jumbo jet.  

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Blog

19 Oct 2015

There is no such thing as silence. Microsoft Sets Guinness World Record for Quietest Place on Earth.

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There is no such thing as silence even on the quietest place on earth. Microsoft now holds the Guinness World Record for Quietest Place on Earth.  You might think that a library reading room or well-insulated basement is a quiet place, but compared to the anechoic chamber in Microsoft’s audio lab, they’re about as quiet as a jumbo jet. The Eckel Anechoic Chamber at Microsoft set a new record at -20.6dB. Brownian motion (the random movement of particles in the air) is the quietest known sound outside the vacuum of space is measured at -23dB. To provide some context of how quiet this is, calm breathing is +10 dB; rustling leaves +20; normal conversation +60 and a jet plane take-off at +150 (at 25 meters). Click here to see a video on the Eckel Anechoic Chamber.

Microsoft and others including hearing aid manufacturers use anechoic chambers in a number of audio research and development applicatons and to test equipment and hearing aids.  

Sources: NBCNews   BusinessWire