What is the meaning of Decibel?

A common measure of intensity ratio (e.g. for sound) that is one tenth of a bel on the logarithmic intensity scale. It is defined as dB = 10 log₁₀(P₁ / P₂), where P₁ and P₂ are the relative intensities.

decibel (unit of sound intensity ratio)

decibel

decibel (a common measure of sound intensity ratio, symbol: dB)

decibel

decibel (a common measure of sound intensity)

decibel

alternative form of decibelio

Source: wiktionary.org