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anti-noise

noun [U]
 
 
/ˈæn.ti.nɔɪz/ US  /-t̬i-/

Definition

sound that is produced in such a way that it matches exactly and removes the effect of loud and possibly harmful noises, such as those produced by large engines in factoriesSound and its properties
(Definition of anti-noise noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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