dB

- A dimensionless logarithmic unit utilized to express the ratio of two powers or intensities, such as voltages, currents, or sound intensities. The number of decibels is
__equal__to 10 times the__common logarithm__of the ratio of the measured powers, or when comparing voltages, currents, or analogous acoustic quantities, it is 20 times the common logarithm. It is equal to 0.1 bels, or approximately 0.1151 nepers. - In
__acoustics__, the__sound pressure__ratio that determines the relative intensity of sounds, against a__reference pressure__. Such a__pressure__is usually defined as 20 micropascals, which is assigned a value of 0 decibels. Anything above this 0 decibels threshold is considered to be__audible__. Before pain sets in, a person with good hearing can listen at 120 decibels, or 20 pascals, which is a__trillion__times louder than 0 decibels. - chemical symbol for dubnium (written as
*Db*) - synonym decibel

**Not what you were looking for?**