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Decibel

//ˈdɛsɪbɛl// noun

Definitions

Noun
  1. 1
    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.
  2. 2
    a logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity wordnet

Etymology

From deci- + bel.

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