Receiving And Emitting Sounds

Probably the most common out of the congenital problems for which babies can be tested is abnormal hearing. Two to four babies per 1,000 enter this world with significant hearing impairment, making the condition 20 times more frequent than phenylketonuria, a metabolic problem for which new-borns are routinely screened. When it comes to the average age at which a serious hearing impairment is diagnosed, the estimates usually range from 14 months to 2 1/2 years.
It may sound early enough but

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