That's all I could see as I slowly moved my hand to feel the edge of the chamber. I'd lost track of time. Had it been 15 minutes? 30? An hour? My heart pounded as I wondered how much longer I had ...

The Latin definition of camera obscura just means "dark chamber," so any dark room or container could technically be considered a kind of camera obscura, but there's realistically a bit more to it ...

THE RACE TO BUILD THE QUIETEST ROOM. The world’s first anechoic chamber, built in 1947 in Murray Hill, Massachusetts, held that title for years.

Known as the anechoic chamber at the company’s headquarters in Redmond, Washington, “ultra-sensitive tests” performed in 2015 gave an average background noise reading of -20.35 dBA (decibels ...