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NEW YORK (CBSMiami/AP) — For those who have a harder time listening to people in noisy backgrounds, research suggests an explanation for that, even for those who have good scores on hearing tests.

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Scientists say it may be due to a loss of crucial connections in nerves of the ear. Most of the research has been done in animals, and researchers are still defining how much of a problem this might be in people.

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It’s not just older people who notice difficulty hearing in noisy situations. Matt Garlock, who’s 29 and lives near Boston, says that happens to him despite his normal score on a standard hearing test. He has volunteered to help Harvard researchers in their studies of what they call “hidden hearing loss.”

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