-A decibel is the standard for the measurement of noise. The zero on a decibel scale is at the threshold of hearing, the lowest sound pressure that can be heard.
-At 45 decibels of noise, the average person cannot sleep. At 120 decibels the ear registers pain, but hearing damage begins at a much lower level, about 85 decibels.
The Specie Circular is a United States presidential executive order issued by President Andrew Jackson in 1836 in accordance with the Coinage Act. It required gold or silver payment for public lands.
