Hearing Aids and Dementia Risk: The Study Everyone’s Misreading
By Dr. Layne Garrett, Au.D., FAAA, ABAC, CH-TM, CDP (About | YouTube | Podcast | LinkedIn)
Date Published: November 25, 2024. Reviewed/updated August 5, 2026
A study published in Neurology in February 2026 found that hearing aids didn’t improve memory test scores, and patients have been bringing me the headline ever since, asking whether it means hearing aids don’t actually help the brain. The same study also found that hearing aid users were significantly less likely to develop dementia over seven years of follow-up. Those two findings aren’t contradictory — they’re telling us something specific about how hearing loss affects the brain, and this article walks through what that actually is.
Table of Contents
- Quick Answer
- Why “Memory Scores Didn’t Improve” Isn’t the Real Finding
- What the Neurology Study Actually Measured
- Why Dementia Risk Can Fall Without Test Scores Changing
- When You Treat Hearing Loss May Matter Most
- What We Track Beyond a Standard Hearing Test
- What This Research Doesn’t Tell Us Yet
- FAQ
Quick Answer
The Neurology study found that hearing aids didn’t move cognitive test scores, but users still developed dementia at a significantly lower rate over seven years — and that’s not a contradiction once you understand that the two measurements capture different things. Cognitive tests measure how sharp your thinking is today; dementia risk reflects how much cognitive reserve your brain has protected for later. Hearing aids appear to work on the second measure by reducing the effort your brain spends decoding sound, which frees up capacity that would otherwise be spent compensating. The clinical takeaway is that earlier treatment protects more of that reserve than waiting does.
Why “Memory Scores Didn’t Improve” Isn’t the Real Finding
When people hear that a study found no improvement in memory or thinking scores, the natural conclusion is that hearing aids must not help the brain.
That conclusion misses the more important finding.
Cognitive tests measure how someone is performing at that moment. They can show whether memory, attention, or processing speed changed over time. What they do not measure as well is whether the brain is being protected against future decline.
Those are not the same thing.
The 2026 study published in Neurology found that hearing aid users and non-users had similar cognitive test scores. However, hearing aid users were less likely to develop dementia during the seven-year follow-up.
That suggests hearing aids may be helping at the level of long-term risk, even when a standard annual test does not show a noticeable improvement.
Many patients with untreated hearing loss have also been compensating for years before they come in. They rely on context clues, watch faces carefully, nod when they miss part of a sentence, or choose the seat where they know they will hear best.
That compensation can work for a while, but it takes mental effort. The strain builds gradually and can stay hidden long before it shows up on a cognitive test.
For a broader explanation of how hearing loss can affect the brain over time, see Hearing Loss and Cognitive Health.
What the Neurology Study Actually Measured
The study published in Neurology in February 2026 followed 2,777 Australian adults age 70 and older who reported moderate hearing loss. None had dementia when the study began.
Researchers tracked two different outcomes over roughly seven years:
- Changes in cognitive test scores
- Which participants went on to develop dementia
The average age of the participants was 75. Some used hearing aids and some did not.
The results were important because they pointed in two different directions. Hearing aid users did not show a meaningful improvement in annual memory or thinking scores compared with non-users. At the same time, they were significantly less likely to develop dementia during the follow-up period.
Those findings are not as contradictory as they first appear.
A cognitive test measures current performance. It tells us how someone is doing on a specific task at a specific point in time. Dementia risk is different. It reflects what may be happening over many years as the brain responds to aging, disease, hearing loss, and other stressors.
One possible explanation is cognitive reserve, which is the brain’s ability to keep functioning even when it is under strain or beginning to experience age-related changes.
Think of cognitive test scores as what you can do today. Cognitive reserve is the extra capacity that helps you keep functioning over time.
The study suggests that hearing aid use may help protect some of that reserve, even when short-term test scores do not noticeably change.
For a broader look at the connection between hearing loss and long-term brain health, see Hearing Loss and Dementia: What the Science Actually Says.
Why Dementia Risk Can Fall Without Test Scores Changing
Two factors may help explain why hearing aid users can have a lower risk of dementia even when their memory test scores do not improve.
The first is effortful listening.
When hearing loss makes speech harder to understand, the brain has to work harder to fill in what was missed. More mental energy gets pulled into decoding words, following conversations, and guessing from context.
That extra effort can take resources away from memory, attention, and processing speed. A properly fitted hearing aid can reduce some of that strain by giving the brain a clearer signal to work with.
The second factor is social engagement.
The 2024 Lancet Commission on dementia prevention identified hearing loss as an important modifiable risk factor for dementia. One likely reason is that untreated hearing loss can gradually lead people to withdraw from conversations and activities.
They may avoid restaurants because the background noise is exhausting. They may stop making phone calls because understanding speech is difficult. They may attend fewer family gatherings because they are tired of asking people to repeat themselves.
Over time, that loss of participation matters.
Hearing aids do more than make sounds louder. When they are fitted and programmed correctly, they can make it easier to stay involved in conversations, relationships, and daily activities.
That may help protect the brain in ways a standard memory test does not immediately capture.
For more on how hearing treatment supports communication and brain function, see Five Skills Your Brain Loses With Hearing Loss and How to Get Them Back.
When You Treat Hearing Loss May Matter
A 2025 Framingham Heart Study analysis found the strongest association between hearing aid use and lower dementia risk among adults younger than 70.
That does not mean hearing treatment stops mattering later in life. It means waiting until hearing loss becomes severe may miss part of the window when reducing listening strain and maintaining social engagement could matter most for long-term brain health.
The practical takeaway is simple: hearing loss is not something to ignore until communication becomes unbearable. Earlier evaluation gives you more options and a clearer baseline to track over time.
For a full breakdown of the study, see Mild Hearing Loss and Dementia Risk: What the Framingham Study Found.
What We Track Beyond a Standard Hearing Test
Most hearing evaluations stop with the ears. This research changes the conversation because it raises a different question: not just how much hearing loss someone has, but how long the brain has been compensating for it.
Many people wait until hearing loss becomes impossible to ignore. They wait until they are missing most conversations, arguing about the television volume, or frustrating family members who are tired of repeating themselves.
That is usually too late to call it early intervention.
At Timpanogos Hearing & Tinnitus, we pair a full diagnostic hearing evaluation with a baseline Cognivue cognitive screening. Cognivue does not diagnose dementia and it does not replace a medical evaluation. It gives us an objective baseline we can track over time as part of a broader hearing treatment plan.
If we treat the hearing loss now and repeat the screening later, we have real data to compare instead of relying only on memory or guesswork.
What This Can Look Like in a Real Patient
A patient I recently saw, whom I will call Ray, came in at age 71 after his daughter encouraged him to get evaluated. He believed his hearing was “fine for his age.” His testing showed significant high-frequency hearing loss and several years of quiet compensation.
His wife had gradually stopped suggesting lunches with friends because conversation had become too difficult. He had adapted, but the adaptation was costing him socially and mentally.
We fitted him with hearing aids and completed a baseline Cognivue screening. His scores were within the normal range, but near the lower end. At his three-month follow-up, several areas had improved.
That does not prove hearing aids reversed cognitive decline. It shows what can happen when we reduce the strain the brain has been carrying just to keep up with conversation.
For more on how hearing treatment supports brain health, see Hearing Loss and Cognitive Health.
What This Research Doesn’t Tell Us Yet
The evidence is encouraging, but it is not the same as proof that hearing aids directly prevent dementia.
The Neurology and Framingham studies were observational. They found that hearing aid users had a lower risk of dementia, but people who seek treatment may also differ in other ways. They may be more socially active, more engaged in their healthcare, or more likely to manage other risk factors.
The ACHIEVE trial published in The Lancet adds stronger evidence because it was a randomized controlled trial. Among older adults at higher risk for cognitive decline, the hearing-intervention group experienced a 48% slower rate of cognitive decline over three years.
That is meaningful, but three years is still a short window compared with the decades over which dementia develops.
Questions Researchers Are Still Studying
Researchers also do not yet know:
- Whether starting treatment in your 50s offers more protection than starting in your 60s
- Whether wearing hearing aids all day matters more than wearing them only occasionally
- Which patients are most likely to see a brain-health benefit
- How much of the benefit comes from clearer sound, lower listening effort, greater social engagement, or a combination of all three
The direction of the research is consistent enough to take seriously, but the exact size of the benefit is still being worked out.
Cognivue and other cognitive screening tools can provide a useful baseline, but they do not diagnose dementia and should not replace a medical evaluation when there is a genuine concern about memory or thinking.
Frequently Asked Questions
Hearing aids cannot guarantee that someone will avoid dementia. However, several studies have found a lower risk of dementia or slower cognitive decline among people who treat hearing loss, especially when treatment begins earlier.
The evidence suggests that hearing aids may help by reducing listening effort and making it easier to stay socially engaged. They should be viewed as one part of a broader brain-health strategy, not as a cure or a promise of prevention.
Memory and thinking tests measure how someone performs at a specific point in time. Dementia risk reflects what may happen over many years.
Hearing aid users did not score significantly better on annual cognitive tests. However, they were less likely to develop dementia during the follow-up period. This suggests that hearing aids may help protect long-term cognitive reserve even when short-term test scores do not noticeably improve.
No. Treating hearing loss can improve communication, safety, relationships, and quality of life at any age.
Some research has found a stronger association between hearing aid use and lower dementia risk when treatment begins before age 70. That supports acting earlier, but it is not a reason to leave hearing loss untreated later in life.
Cognitive reserve is the brain’s ability to continue functioning despite aging, illness, or other stress.
A person with greater cognitive reserve may be able to compensate for changes in the brain longer before problems become noticeable. Reducing listening effort and staying socially and mentally engaged may help protect that reserve over time.
Yes. At Timpanogos Hearing & Tinnitus, we include a baseline Cognivue cognitive screening with every full diagnostic hearing evaluation.
Cognivue does not diagnose dementia and does not replace a medical evaluation. It gives us an objective baseline that can be tracked over time as part of a patient’s hearing and brain-health plan.
Want a broader look at the habits that support long-term brain health? Use the Brain Care Score below to see where you may have room to improve.
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What This Means for Your Next Step
If you have been putting off a hearing evaluation because your hearing loss does not seem “bad enough yet,” this research is a good reason to reconsider that timeline.
The goal is not to scare people into hearing aids or claim that treating hearing loss guarantees dementia prevention. The more reasonable takeaway is that hearing loss may affect the brain long before communication becomes unbearable, and earlier evaluation gives you more options.
A full diagnostic evaluation can establish:
- How much hearing loss is present
- How well you understand speech in background noise
- Whether you are already compensating more than you realize
- A baseline Cognivue cognitive screening that can be tracked over time
Timpanogos Hearing & Tinnitus provides comprehensive hearing and cognitive baseline evaluations at our Utah Valley clinics in American Fork and Spanish Fork, as well as our South Jordan location serving the southern Salt Lake Valley.
Schedule a free consultation to get a clearer picture of where your hearing stands and whether treatment should be considered now.
About the Author
Dr. Layne Garrett, Au.D., FAAA, ABAC, CH-TM, CDP is the founder of Timpanogos Hearing & Tinnitus, with clinic locations in American Fork and Spanish Fork, Utah. Over 20 years, he has specialized in tinnitus management, helping thousands of patients. Timpanogos Hearing & Tinnitus has been recognized as Best of State in Auditory Services 15 times and is one of only 14 Lenire Preferred Providers in the United States. His practice emphasizes patient education over sales-driven care.
Reviewed/Edited By
Reviewed/Edited by: Dr. Layne Garrett, Au.D., FAAA, ABAC, CH-TM, CDP Date: August 5, 2026
