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Deafness and Hereditary Hearing Loss Overview - GeneReviews® - NCBI Bookshelf
瀏覽：1038
日期：2025-11-20
Severity of hearing loss. Hearing is measured in decibels (dB). The threshold or 0 dB mark for each frequency refers to the level at which normal young adults perceive a tone burst 50% of the time. Hearing is considered normal if an individual's threshold...看更多
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