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# What is 1 dB?

Decibel (dB), united to express the proportion between two physical quantities, usually quantities of acoustic or electrical energy, or to measure or relative noise of sounds. A decibel (0.1 bell) is equal to 10 times the common logarithm of logarithm of the power ratio.Decibel is a unit for expressing the ratio between two physical quantities, usually amounts of acoustic or electric power. 10 times the common logarithm of the power ratio is equal to one decibel.

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