ORFIELD LABORATORIES in South Minneapolis is the home of a space that was once dubbed “the quietest place on earth” by Guinness World Records. (As of 2015, that title now belongs to a quiet room developed by Microsoft in Washington state). The lab is called an anechoic chamber, meaning there is no echo as the room absorbs 99.99 percent of sound. It is used by various manufacturers to test product volume and sound quality—and it can also drive a person mad.
https://www.atlasobscura.com/places/orfi...et-chamber
Sounds like an incredibly eerie experience, trying to process the lack of ambient noise.
https://www.atlasobscura.com/places/orfi...et-chamber
Sounds like an incredibly eerie experience, trying to process the lack of ambient noise.