A unit familiar with express general difference in power or intensity, frequently between two acoustic or electric indicators, corresponding to ten times the normal logarithm of this ratio of this two levels.

a standard measure of noise strength that is one tenth of a bel on the logarithmic power scale. It is defined as dB = 10 * log10(P 1/P 2), in which P1 and P2 will be the relative capabilities for the noise.

a logarithmic device of sound power; 10 times the logarithm regarding the proportion of noise intensity to some reference power

## How would you define decibel?