The effects of road traffic noise on mental performance.

Iranian J Environ Health Sci Eng · 2013 · PMC3599650 · PMID 23394722

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highly significantno p-value reported

It is shown that road traffic noise has highly significant correlation to cognitive abilities such as working memory and sustained attention [ 19 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.