Why is there a mandated newborn hearing screening?

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Why is there a mandated newborn hearing screening? To help guide your answer, you can include: (1) what is the newborn hearing screening (2) what information does the screening give us (3) what happens to the children that are ‘referred’ on the screening (4) what would happen to those children if they’re not screened early on (5) what general issues/outcomes does the newborn hearing screening prevent?