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Glossary » Units » Logarithm of a Ratio » Decibel (power)
Decibel (power) (dB (power)) is a unit in the category of Logarithm of a ratio. It is also known as decibels. This unit is commonly used in the SI unit system. Decibel (power) (dB (power)) has a dimension of nil (log) where L is length, N is amount of substance, and I is electric current. It essentially the same as the corresponding standard SI unit dB.
Note that the seven base dimensions are M (Mass), L (Length), T (Time), Q (Temperature), N (Aamount of Substance), I (Electric Current), and J (Luminous Intensity).

Other units in the category of Logarithm of a ratio include Bel (power) (B (power)), Bel (voltage) (B (voltage)), Decibel (voltage) (dB (voltage)), and Neper (NP).

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