Hearing Loss

Eliminating hearing loss at the population level could prevent approximately 7% of all dementia cases. Observational studies have associated hearing aid use with reduced incident dementia and slower global cognitive decline. The hearing loss described is not uniform across all sound frequencies. High-quality trial evidence for cognitive benefits of hearing aids in individuals already at high dementia risk remains scarce. Hearing loss accelerates cognitive decline through excessive cognitive load from effortful listening, hearing-loss-driven structural brain changes, and social disengagement from communication difficulties. Hearing loss is currently identified as the single largest modifiable risk factor for dementia. Older adults with hearing loss face a 1.44 to 2.06 times elevated risk of developing mild cognitive impairment and a 1.28 to 2.42 times elevated risk of progressing to full dementia. Hearing damage can be caused by childhood exposure to loud noise without proper protection. Hearing loss can occur progressively over time from hazardous headphone volume, even when not immediately apparent. Repeated gunfire exposure without hearing protection caused measurable damage in…