In some people , gradual hearing loss may also be an early sign of types of dementia . `` We listen with our ears but hear with our brains , '' a source says . 30 Americans have impaired hearing ; dementia predicted for 30 million in 30 million by between the ages of 36 and 90 .
In some people , gradual hearing loss may also be an early sign of types of dementia . `` We listen with our ears but hear with our brains , '' a source says . 30 million Americans have impaired hearing ; dementia predicted for 1 in 30 by 2050 .