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English definition of “decibel”

decibel

noun [C]     /ˈdes.ɪ.bel/
a unit for measuring the loudness of sound: The typical lawn mower makes about 90 decibels of noise.Weighing and measuringSound and its properties
(Definition of decibel noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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