When it comes to soundproof chambers, the quietest place on earth is a studio at [Orfield Labs][1]. Quoting from [this article from the Smithsonian Magazine][2], the studio is `So silent that the background noise measured is actually negative decibels, -9.4 dBA.` The studio is in fact in the Guinnes book of records for being 99.99% sound absorbent. Yes, staying in the room for more than an hour *will* drive you crazy.

Below is an image of the lab, and its record-winning certificate (courtesy of [Daily Mail Online][3]):

![Orfield Lab][4]

![Record certificate][5]


  [1]: http://www.orfieldlabs.com/researchtour4.html
  [2]: http://www.smithsonianmag.com/smart-news/earths-quietest-place-will-drive-you-crazy-in-45-minutes-180948160/?no-ist
  [3]: http://www.dailymail.co.uk/sciencetech/article-2124581/The-worlds-quietest-place-chamber-Orfield-Laboratories.html
  [4]: https://i.sstatic.net/JbDQ0.jpg
  [5]: https://i.sstatic.net/44tLm.jpg