What if one of the earliest warning signs of memory loss wasn’t in your brain at all—but in your ears? Millions of people quietly lose hearing ability as they age, brushing it off as “normal.” But emerging research suggests that overlooking it could have far more serious consequences than anyone expected—potentially accelerating cognitive decline in ways scientists are only beginning to understand.
Key Takeaways
Hearing loss is strongly linked to increased risk of dementia, with risk rising alongside severity
Hearing aids may improve memory, executive function, and overall cognitive performance
Early intervention and consistent use appear critical for protecting long-term brain health
What You’re Not Hearing Might Be Hurting Your Brain
Age-related hearing loss, or presbycusis, is one of the most common health conditions affecting older adults. Tens of millions of people worldwide are affected. In the United States, as many as one person out of every three over age 65, and half of those over 85, have some hearing loss.1
But here’s the kicker: although age-related hearing loss can be easily treated, only about 14 percent of adult Americans with hearing loss wear hearing aids.2 People simply aren’t getting the treatment they need. Some people shun hearing aids because of the “old-age” stigma, while others just can’t afford them as they're seldom covered by health plans.
No matter what your feelings about hearing aids are, if you need them, the latest research shows you shouldn’t delay because your memory might depend on them. It’s no exaggeration to say, “Lose your hearing, lose your mind”. . . We’ve written about the link between hearing loss and memory loss before, and now even more research points to a strong link between untreated hearing loss and cognitive decline.
The Connection Between Your Brain and Your Ears
Researchers first studied the possible connection between hearing loss and dementia on a large scale in 2011. Dr. Frank Lin at the Johns Hopkins School of Medicine published the results of a study that tested the hearing of 639 older adults who were dementia-free. The scientists tracked them for nearly 12 years; 58 developed Alzheimer’s or another cognitive impairment.3 They found that a participant’s chance of developing dementia increased in direct proportion to the severity of his or her hearing loss at the onset of the study. In an interview with The New York Times, Dr. Lin said the relationship seems to be “very, very linear.”4 In other words, the greater the hearing loss, the greater the risk of developing dementia. On the flip side, researchers recently discovered some good news: Wearing hearing aids may delay cognitive decline in older adults and even improve brain function.
Hearing Aids Can Delay Dementia
The first large randomized trial found that treating hearing loss can slow cognitive decline—especially in those already at risk—cutting the rate of decline nearly in half. This study was run by Dr. Lin through The National Institute on Aging and was completed in 2023.5
In another study, researchers at the University of Melbourne tested the use of hearing aids in almost 100 adults, aged 62 to 82, with hearing loss. After 18 months of hearing aid use, researchers found that speech perception, self-reported listening disability, and quality of life had significantly improved for participants.6
But here’s the most promising news… Scientists discovered that an incredible 97.3 percent of participants in this study showed either clinically significant improvement or stability in executive function. This is the mental ability to plan, organize information, and initiate tasks. It’s often lost in Alzheimer’s and other types of dementia. What’s more, it seems that women, in particular, reaped the cognitive rewards of hearing loss treatment. They benefited in the working memory department, used for reasoning and decision-making. Scientists found that more frequent use of hearing aids was linked to greater improvements in cognitive function. And women were much more vigilant about wearing the devices than men.
Effective Treatment for Cognitive Decline
University of Melbourne Associate Professor and Chief Investigator of the study, Julia Sarant, explained the significance of the findings, noting that researchers rarely see improvements in cognitive function in older adults. "Although there are successful treatments for hearing loss, there is currently no successful treatment for cognitive decline or dementia," Professor Sarant said. [Editor’s note: not quite true, but conventional medicine persists in believing this.] "This research is a positive step in investigating the treatment of hearing aids to delay cognitive decline.” She looks forward to examining the outcomes from a larger sample size with those of a healthy aging comparison group of older Australians who have typical hearing for their age.
Worth the Cost
At this point, Medicare does not cover 100 percent of the cost of hearing aids. I’m hopeful that studies like these will push lawmakers to amend the program to cover hearing aids and services. Meanwhile, I advocate a two-pronged approach; treat hearing loss and follow all the known components of healthy aging, including a healthy diet and regular exercise.
Frequently Asked Questions
Can hearing loss really affect memory?
Yes, research shows untreated hearing loss is associated with a higher risk of cognitive decline and dementia.
Why does hearing loss impact the brain?
It may increase cognitive load, reduce brain stimulation, and accelerate brain atrophy over time.
Do hearing aids help prevent dementia?
Studies suggest they may slow cognitive decline and improve memory and executive function.
Who is most at risk?
Adults over 65 are most affected, with risk increasing significantly with age.
Is it too late to treat hearing loss?
No—evidence suggests benefits even when treatment begins later in life.
- https://ghr.nlm.nih.gov/condition/age-related-hearing-loss#statistics
- https://www.nidcd.nih.gov/health/statistics/quick-statistics-hearing
- https://jamanetwork.com/journals/jamaneurology/fullarticle/802291
- https://www.nytimes.com/2020/02/20/magazine/hearing-loss-dementia-alzheimers.html
Lin FR, Pike JR, Albert MS, et al.
Hearing intervention versus health education control to reduce cognitive decline in older adults with hearing loss in the USA (ACHIEVE): a multicentre, randomised controlled trial. The Lancet. 2023;402(10404):786–797.- "Hearing aids may delay cognitive decline."ScienceDaily. 26 February 2020.
