Untreated hearing loss is associated with cognitive decline, increased dementia risk, and more. Learn how proactive hearing care may help lower that risk and support long-term brain health.
Hearing loss isn’t just about turning up the TV. It’s a common, ongoing sensory condition that can affect how your brain functions and even influence long-term health.
Over the past 20 years, researchers have found a consistent association between untreated hearing loss and a higher risk of cognitive decline and dementia. In fact, hearing loss is now considered one of the largest potentially modifiable midlife risk factors for dementia worldwide, based on population-level estimates.
Understanding this connection matters. Treating hearing loss isn’t just about hearing conversations more clearly; it may also help support and protect your brain, because your hearing and your brain work closely together.
Hearing Is a Brain-Driven Process
We often think hearing happens in the ears — but it really happens in the brain.
Your ears collect sound, but your brain does the heavy lifting. It:
- Makes speech clear
- Filters out background noise
- Understands meaning
- Figures out where sound is coming from
- Connects what you hear with memory and attention
When hearing loss makes sounds softer or less clear, your brain has to work harder to fill in the gaps. This extra effort is called cognitive load — basically, your brain using more energy just to understand what’s being said.
Studies show that people with hearing loss have increased activity in the front part of the brain (the area involved in effort and concentration) when listening. Over time, this constant extra effort may pull mental energy away from memory, decision-making, and higher-level thinking.
In simple terms: if your brain is working overtime just to hear, it has less energy left for everything else.
Hearing Loss and Dementia Risk
One of the most important discoveries in recent medical research is the link between hearing loss and dementia.
A landmark study conducted by Johns Hopkins researchers found:
- Mild hearing loss was associated with about 2 times the risk of dementia.
- Moderate hearing loss was associated with about 3 times the risk.
- Severe hearing loss was associated with up to about 5 times the risk
Further research from The Lancet Commission identified hearing loss as the largest potentially modifiable midlife risk factor for dementia, with modeling studies suggesting it could account for roughly 8% of global dementia cases if the relationship is causal.
To be clear: Hearing loss does not directly cause dementia.
However, research suggests it may increase vulnerability through several biological and lifestyle-related pathways, although these mechanisms are still being clarified.
Why Would Hearing Loss Affect the Brain?
Researchers believe there are a few main reasons for this connection:
1. Mental Overload
When sounds are unclear, your brain shifts more resources toward trying to decode speech. That likely leaves fewer mental resources available for storing memories or managing complex thinking.
Over time, this constant strain may accelerate decline — especially in individuals who already have other risk factors.
2. Changes in Brain Structure
Brain imaging studies show that untreated hearing loss is associated with faster shrinkage (atrophy) in certain brain regions, particularly parts of the temporal lobe that help process sound and support memory.
When the brain isn’t receiving enough clear sound input, those areas may not stay as active or as healthy.
3. Social Withdrawal
When hearing becomes difficult, people often start pulling back from social activities, sometimes without realizing it.
Social isolation itself is a known risk factor for cognitive decline and dementia.
If conversations become frustrating and social interaction decreases, the brain may receive less stimulation — which is itself linked to higher dementia risk.
The ACHIEVE Study: Strong Evidence That Intervention Helps
Here’s the encouraging news.
The 2023 ACHIEVE study, a large, randomized clinical trial, found that a hearing treatment program — including properly fitted hearing aids and ongoing audiologic care — slowed cognitive decline over three years in older adults who were already at increased risk for dementia.
In this higher‑risk subgroup, participants who received hearing treatment had about a 48% slower rate of decline in thinking and memory on average than those who did not.
This provides some of the strongest evidence so far that treating hearing loss may help support brain health in older adults at increased risk, although longer‑term studies are still needed.
Hearing Loss, Balance, and Safety
Your hearing system and balance system are closely connected in the inner ear and brainstem.
Research shows that hearing loss is linked to a higher risk of falls — one of the leading causes of injury (and sometimes death) in older adults.
In fact, one study found that for every additional 10‑decibel increase in hearing loss, the odds of falling increased by about 40%.
Falls can lead to serious injuries, including traumatic brain injury, hospitalization, and long-term health complications. Addressing hearing loss may also help reduce fall risk and support overall safety.
Tinnitus and Brain Strain
Tinnitus is also known as “ringing in the ears,” or that “whooshing” or “rushing” sound that only you can hear inside your ears or head. Some people report just hearing one clear tone that plays intermittently.
However tinnitus presents itself, studies suggest that about 80–90% of people with tinnitus also have some degree of hearing loss.
Chronic tinnitus can:
- Increase mental strain
- Disrupt sleep
- Raise stress levels
All of these can affect cognitive resilience over time.
Treating hearing loss often plays an important role in managing tinnitus and reducing overall brain strain.
Signs Your Brain May Be Working Too Hard to Hear
Hearing loss often develops slowly, so it’s easy to miss. However, your brain may be telling you something.
Common signs include:
- Feeling mentally exhausted after conversations
- Struggling to understand speech in noisy places
- Missing parts of sentences
- Avoiding social situations
- Trouble following group discussions
- Needing higher TV or phone volume
These might not simply be minor frustrations — they could be signaling increased cognitive burden.
Hearing Care as Preventive Brain Health
Preventive medicine focuses on risk factors we can modify.
Hearing loss is one of them.
Unlike genetic risks, hearing loss can be measured, diagnosed, and treated.
Properly fitted hearing aids can:
- Improve sound clarity
- Reduce listening effort
- Support social engagement
- Help restore healthy auditory input
- Potentially slow cognitive decline, especially in older adults who are already at higher risk for dementia
The earlier hearing loss is addressed, the more easily the brain appears to adapt to clearer sound.
Waiting until hearing loss becomes severe may make that adaptation more difficult.
Take Action to Protect Your Brain
If you’ve noticed signs of hearing difficulty, or if it’s been more than a year since your last hearing evaluation, it may be time to schedule a check.
The science is clear that untreated hearing loss is associated with increased cognitive risk, even though researchers are still studying exactly how much treatment can reduce that risk. Addressing it is a proactive step toward protecting your brain and your future quality of life.
Schedule a comprehensive hearing evaluation with Burgess Hearing Aids today.
Understanding the connection between hearing loss and brain health empowers you to make informed decisions. Early action may make a meaningful difference in your long-term cognitive wellness.
References
- Livingston, G., et al. (2020). Dementia prevention, intervention, and care: 2020 report of the Lancet Commission. The Lancet. https://www.thelancet.com/article/S0140-6736(20)30367-6/fulltext Accessed February 19, 2026
- Peelle, J.E., & Wingfield, A. (2016). The neural consequences of age-related hearing loss. Trends in Cognitive Sciences. https://pmc.ncbi.nlm.nih.gov/articles/PMC4930712/ Accessed February 19, 2026
- Lin, F.R., et al. (2011). Hearing loss and incident dementia. Archives of Neurology. https://pmc.ncbi.nlm.nih.gov/articles/PMC3277836/ Accessed February 19, 2026
- Pichora-Fuller, M.K., et al. (2016). Hearing impairment and cognitive energy. Ear and Hearing. https://pubmed.ncbi.nlm.nih.gov/27355771/ Accessed February 19, 2026
- Lin, F.R., et al. (2014). Association of hearing impairment with brain volume changes. NeuroImage. https://pubmed.ncbi.nlm.nih.gov/24412398/ Accessed February 19, 2026
- National Institute on Aging. Social isolation and cognitive health. https://www.nia.nih.gov/news/social-isolation-loneliness-older-people-pose-health-risks Accessed February 19, 2026
- ACHIEVE Study Group (2023). Hearing intervention and cognitive decline. The Lancet. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(23)01406-X/abstractAccessed February 19, 2026
- Lin, F.R., & Ferrucci, L. (2012). Hearing loss and falls among older adults. Archives of Internal Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC3518403/ Accessed February 19, 2026
- American Tinnitus Association. Tinnitus statistics. https://pmc.ncbi.nlm.nih.gov/articles/PMC10806285/ Accessed February 19, 2026