Inside the unassuming headquarters of Orfield Laboratories in Minneapolis is a strange looking room with deafening silence. Called an anechoic chamber, the room held the Guinness World Record for quietest place in the world for nearly a decade.
While the novelty of the room is interesting in and of itself, the room also serves a practical purpose.

By having a virtually silent room to conduct the tests in, they can ensure that they are testing based on their test sound and nothing else.
When checked, Shutterstock's safe search screens restricted content and excludes it from your search results. Inside the room, all the surfaces -- walls, floor and ceiling -- are covered by three-foot long fiberglass wedges that absorb nearly all sound waves.

Orfield Laboratories is a research facility, and they use their anechoic chamber to test products that emit noise, like speakers, and receive noise, like microphones.

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