Do you know which the quietiest place on Earth is? It is Microsoft office in Redmond headquarters in USA. To be precise Anechoic chamber is the exact place at -20.6 dB. There are six concrete rooms within rooms that enclose the chamber and can reduce the noise of a jet taking off to a whisper. Literal meaning of Anechoic is echo free. Year 2015 saw the world record of -9.4dB in Orfield Laboratories in Minneapolis. Let’s walk through sounds heard at different decibels (dB) which is a measurement unit…