Minneapolis building with one of the quietest rooms in the world
Orfield Laboratories is a Minneapolis multi-sensory design research laboratory consulting in architectural and product development and research. It was founded in 1971 by Steven J Orfield. Inside the building is an anechoic chamber that is one of the quietest places on earth, absorbing 99.9% of sound. The room attracts media attention and inspires rumors and speculation about the psychological effects of spending time in silence. Building. The building, located in the Seward neighborhood of Minneapolis, was built in 1970 and originally served as a recording studio called Sound 80.
https://en.wikipedia.org/wiki/Orfield_Laboratories