Medicine

What is deafness?

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... deafness partial or total lack of hearing. A person who cannot detect sound at an amplitude of 20 decibels in a frequency range of from 800 to 1,800 vibrations per second is said to be hard of hearing.

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Similar questions: What is the requirement to be deaf or hard of hearing? What does deaf mean? What is hard of hearing? [ Hide these questions ]

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