Studies have shown that as we age, cognitive decline can be linked to hearing loss. People over the age of 65 who have hearing loss are 24% more likely to have some level cognitive impairment, compared to people with normal hearing. While more research is needed to determine the exact cause of this relationship, there is solid evidence that the brain needs frequent stimulation to keep working at a high level. Aural stimulation (hearing) is an important factor. The successful treatment of hearing loss, which usually involves hearing aids, can restore significant aural stimulation to the brain and may significantly reduce cognitive decline.