You might think we hear with our brains, not our ears. But technically we hear with both, unless the brain is processing sounds incorrectly. Incoming sounds (like human voices or birds chirping) are just noise and not anything meaningful, otherwise.
According to experts at the Better Hearing Institute, people with hearing loss have less gray matter in the auditory cortex. The auditory cortex is a region of the brain needed to support speech comprehension. Gray matter is the the area of the brain that serves to process information.
A brain abnormality in the structure of the brain in people with hearing loss was noticed in an MRI by researchers from the Brandeis University and Washington University. The hypothesis garnered by experts is that reduced sensory stimulation, which causes the brain to recognize activity, caused the brain abnormality in people with hearing loss.
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