English Explanatory Dictionary

decibel

English dictionary entry

Meanings

noun
  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.

Pronunciation

/ˈdɛsɪbɛl/ /ˈdɛsɪbəl/ LL-Q1860 (eng)-Vealhurl-decibel.wav LL-Q1860 (eng)-Vealhurl-decibel2.wav

Word forms

decibel decibels

Etymology

From deci- + bel.

Derived words

megadecibel subdecibel
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