Decibel Definition

dĕsə-bəl, -bĕl
noun
A numerical expression of the relative loudness of a sound: the difference in decibels between two sounds is ten times the common logarithm of the ratio of their power levels.
Webster's New World
A numerical expression of the relative differences in power levels of electrical signals equal to ten times the common logarithm of the ratio of the two signal powers Sometimes an absolute reference is used in the power ratio (10-16 watt per sq cm in acoustics, one milliwatt in electronics and radio)
Webster's New World
Synonyms:
  • db

Other Word Forms of Decibel

Noun

Singular:
decibel
Plural:
decibels

Origin of Decibel

  • deci– bel

    From American Heritage Dictionary of the English Language, 5th Edition

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