Microsoft has posted a 360 degree video that shows off the anechoic chamber in Building 87 in its Redmond, Washington campus. It has been named as the quietest place on Earth by the Guinness World Record organization
The video, as posted on YouTube, shows the room with sharp wedges that are placed in the walls, ceiling and floor that are designed to absorb sound. The room has been recorded to have a sound as low as -20dB. The chamber's wedges, as well as the concrete wall that surrounds it, also eliminates all outside sound when it is sealed up.