Decibel

1. A decibel (dB) is a unit of of measurement of voltage or other type of intensity. Decibels are one tenth of a bel.
2. Abbreviation for DeciBels Adjusted, dBA is the noise power calculated in dB. 0 dBA is equal to 3.16 picowatts (-85 dBm).

• See the University of New South Wales decibel page for a much more in-depth definition of decibel.

Also see: Measurement, Nepers, Power definitions, Sound definitions