Resources
- safety
- OSHA Technical Manual (OTM). Section 3, Chapter 5: Noise. Occupational Safety and Health Administration (OSHA). US Department of Labor.
- world's loudest sound
- world's quietest room
- −20 dB
- Audio Lab | Microsoft: Inside B87
- The Quietest Place on Earth? Microsoft. YouTube (2015). Microsoft Building 87: When precision is paramount, every decibel counts. See (and hear) if the Microsoft's anechoic chamber in the Audio Labs breaks the Guinness World Records title for the Quietest place on Earth.
- 360 Video: Inside the Quietest Place on Earth. Microsoft. YouTube (2016). Explore the strange and beautiful anechoic chamber where Microsoft designs, builds and tests the audio experience for products like Xbox, HoloLens and Surface.
- −9 dB