- David S. Klein, MD FACA FACPM
- 11 minutes ago
- 7 min read
As a practicing physician, over the past 40 years, or so, I have been asked a deceptively simple question: “Do I really need hearing aids yet?” My answer, more often than you might expect, is “yes.” Not only because hearing well restores confidence, relationships, and safety—but because untreated hearing loss is one of the strongest modifiable risk factors linked with cognitive decline and dementia. Modern evidence suggests that identifying and treating hearing loss earlier is a practical way to support long-term brain health. PubMed
Over the last decade, several large population studies have shown that adults with untreated hearing loss have a higher risk of developing cognitive impairment and dementia than peers with normal hearing. The relationship is graded: the worse the hearing, the higher the risk. In a landmark prospective cohort from Johns Hopkins, every step from mild to moderate to severe hearing loss was associated with progressively greater dementia risk. JAMA Network+1
Why does this happen? There are three leading—complementary—mechanisms:
Cognitive load (“listening effort”) When hearing is impaired, your brain must reallocate resources to decode garbled sound. That chronic effort leaves fewer resources for memory and thinking, accelerating fatigue and reducing cognitive reserve.
Auditory deprivation and brain structure Reduced sensory input over years is associated with changes in brain structure and connectivity (especially in temporal and parietal regions). Recent longitudinal work tied hearing loss to smaller brain volumes and more white-matter abnormalities, with hearing-aid use appearing to mitigate some of these risks. JAMA Network
Social isolation and downstream health effects Hearing loss increases withdrawal, depression, and reduced physical activity—each independently linked with faster cognitive decline. The Lancet Commission identified hearing impairment as a major modifiable risk factor for dementia across the life course. The Lancet+1
Think of hearing as the brain’s daily workout. When the input is degraded, the brain works harder yet gets poorer “exercise.” Restoring clear input with hearing aids supports the neural networks that interpret speech and context, keeping them active and connected.
This is the crucial question—and we finally have randomized trial data. The ACHIEVE trial enrolled older adults with hearing loss and followed them for three years. Compared with a control group receiving health education, those randomized to a comprehensive hearing intervention (best-practice fitting of hearing aids plus counseling) experienced less cognitive decline—particularly among participants at higher baseline dementia risk (for example, older adults with cardiovascular risk burdens). These results align with years of observational studies showing that hearing-aid users tend to maintain better cognitive trajectories than non-users. AGs Journals+3The Lancet+3PubMed+3
Two nuances matter:
Who benefits most? In ACHIEVE, protection against cognitive decline was most evident in the higher-risk subgroup (those with greater underlying risk based on age and comorbidities), suggesting that early adoption may be especially important for individuals with other dementia risks. The Lancet+1
What to expect: Hearing aids are not a “cure for dementia,” and not every study shows the same magnitude of effect across all groups. But taken together, the evidence supports hearing care as a reasonable, actionable prevention strategy—with strong quality-of-life upside even beyond cognition. Health
How untreated hearing loss accelerates risk
Let’s translate data into everyday experience. Imagine two 70-year-old patients:
Patient A strains to follow conversations, avoids restaurants, and “fills in the blanks” on television by guessing. Family notices more repetition (“What?”) and quiet withdrawal.
Patient B uses well-fitted hearing aids and attends to maintenance (batteries/charging, cleaning, periodic adjustments). They stay socially active, engage in group exercise, and enjoy lectures and conversation.
Both patients may have similar medical profiles, but Patient B is consistently stimulating auditory-language networks and minimizing isolation—two conditions associated with healthier long-term cognitive outcomes in observational data, reinforced by randomized evidence in higher-risk individuals. The Lancet+1
Early signs that deserve attention
Not all hearing loss announces itself. Look for:
Needing captions even at normal volumes
Trouble hearing in restaurants or meetings
Family complaining you talk loudly or miss words
Ringing in the ears (tinnitus)
“I hear you, but I can’t understand you”
If these sound familiar, a professional audiologic evaluation is prudent. Objective testing goes far beyond the whispered-voice test and helps tailor precise amplification to your pattern of loss.
“I’m not ready for hearing aids.” Common barriers—and straight answers
“They’ll make me look old.”Contemporary devices are small, nearly invisible, and tech-forward—Bluetooth streaming, smartphone control, and rechargeable options. The greater “tell” of aging is repeatedly mishearing or withdrawing from conversation.
“I tried them and didn’t like them.”Adaption is a process. The auditory cortex needs time to re-learn crisp sound after years of muffled input. Best-practice fitting with real-ear measurement, follow-up fine-tuning, and communication strategies (placement at the dinner table, managing background noise) transform outcomes.
“They’re expensive.”Options exist across a spectrum—including over-the-counter (OTC) devices for mild to moderate loss. A medical-grade fitting is still ideal for most, but even OTC amplification can be a clinically meaningful first step. And when you weigh the cost of isolation, falls, medical errors, and caregiver stress, amplification is an investment in independence and brain health.
What the numbers say
In a well-designed prospective study, each 10-dB increase in hearing loss was associated with a higher risk of incident dementia, with hazard ratios climbing from mild to severe loss. JAMA Network
Large cohorts repeatedly show that people who use hearing aids experience slower cognitive decline than comparable adults who do not. PubMed+1
The Lancet Commission ranks hearing loss among the top modifiable risk factors for dementia across the life course and recommends increasing access to hearing care (including hearing aids). The Lancet+1
The ACHIEVE randomized trial indicates that a comprehensive hearing-care program can reduce cognitive decline over three years in older adults at elevated risk—evidence that targeted intervention matters. The Lancet
Beyond cognition: whole-person benefits you’ll feel in weeks
Safer mobility: Better environmental awareness reduces falls and improves driving safety.
Medical accuracy: You’re less likely to mishear instructions or medication changes.
Mood and relationships: Amplification relieves the chronic strain on spouses and families, reducing conflict and isolation.
Energy: Many patients describe lower “listening fatigue,” improving resilience for exercise, hobbies, and social life.
A practical plan to protect your brain
Get a baseline hearing test now.Adults over 55—earlier if you have noise exposure, diabetes, vascular risks, or a family history—benefit from audiometric screening. Repeat every 1–2 years.
Treat when ready—preferably sooner.If you have measurable loss that affects understanding (especially in noise), strongly consider hearing aids. Early adoption eases brain adaptation and supports social engagement.
Insist on best-practice fitting.Look for real-ear verification, device counseling, and structured follow-ups. These steps are not “nice-to-have”—they’re essential.
Address the full risk profile.Control blood pressure, lipids, and glucose; stay physically active; prioritize sleep; curb smoking; treat depression; and protect your vision—multi-domain prevention magnifies the benefit of hearing care. The Lancet
Lean into communication strategies.Face your conversation partner, reduce background noise when possible, and use assistive mics at restaurants or lectures. Pair your aids with your phone for calls and captions.
What if cognitive changes are already present?
Do not delay care. Even when memory complaints arise, improving hearing can enhance day-to-day function, reduce caregiver burden, and maintain independence. While no therapy can guarantee dementia prevention, hearing-care interventions are safe, scalable, and supported by growing evidence as part of comprehensive brain-health planning. The Lancet
References
Livingston G, Huntley J, Sommerlad A, et al. Dementia prevention, intervention, and care: 2020 report of the Lancet Commission. Lancet. 2020;396(10248):413-446. doi:10.1016/S0140-6736(20)30367-6 The Lancet+1
Lin FR, Metter EJ, O’Brien RJ, Resnick SM, Zonderman AB, Ferrucci L. Hearing loss and incident dementia. Arch Neurol. 2011;68(2):214-220. doi:10.1001/archneurol.2010.362 JAMA Network+1
Deal JA, Betz J, Yaffe K, et al. Hearing impairment and incident dementia and cognitive decline in older adults: the Health ABC Study. J Gerontol A Biol Sci Med Sci. 2017;72(5):703-709. doi:10.1093/gerona/glw069 PubMed
Maharani A, Dawes P, Nazroo J, Tampubolon G, Pendleton N. Longitudinal relationship between hearing aid use and cognitive function in older Americans. J Am Geriatr Soc. 2018;66(6):1130-1136. doi:10.1111/jgs.15363 PubMed+1
Lin FR, Pike JR, Albert MS, et al. Hearing intervention versus health education control to reduce cognitive decline in older adults with hearing loss (ACHIEVE): a randomized trial. Lancet. 2023;402(10397):1071-1081. doi:10.1016/S0140-6736(23)01406-X The Lancet+1
Liu K, Simmonds MB, Dillon H. Hearing intervention and cognitive decline: interpreting ACHIEVE. Lancet. 2024;403(10429):e56-e58. doi:10.1016/S0140-6736(24)00712-8 The Lancet
Gurgel RK, Ward PD, Schwartz S, Norton MC, Foster NL, Tschanz JT. Relationship of hearing loss and dementia: a prospective, population-based study. Otol Neurotol. 2014;35(5):775-781. doi:10.1097/MAO.0000000000000313 PubMed+1
Dawes P, Emsley R, Cruickshanks KJ, et al. Hearing-aid use and long-term health outcomes: hearing handicap, mental health, social engagement, cognitive function, physical health, and mortality. Int J Audiol. 2015;54(11):838-844. doi:10.3109/14992027.2015.1059503 PubMed
Amieva H, Ouvrard C, Giulioli C, Meillon C, Rullier L, Dartigues JF. Self-reported hearing loss, hearing aids, and cognitive decline in elderly adults: a 25-year study. J Am Geriatr Soc. 2015;63(10):2099-2104. doi:10.1111/jgs.13649 PubMed+1
Myrstad C, Moulsdale P, Engdahl B, et al. Hearing impairment and risk of dementia in the HUNT study. eClinicalMedicine. 2023;63:102198. doi:10.1016/j.eclinm.2023.102198 The Lancet
Livingston G, Huntley J, Sommerlad A, et al. The Lancet launches new guidance on dementia risk reduction (news release summarizing Commission findings). Alzheimer’s Disease International; 2020. Alzheimer's Disease International
Kolo FB, Zlatev A, Pase MP, et al. Hearing loss, brain structure, cognition, and dementia risk in the Framingham Study. JAMA Netw Open. 2025;8(11):exxxxxx. doi:10.1001/jamanetworkopen.2025.xxxxxx JAMA Network
Ray J, Popli G, Fell G. Association of cognition and age-related hearing impairment in the English Longitudinal Study of Ageing. JAMA Otolaryngol Head Neck Surg. 2018;144(10):876-882. doi:10.1001/jamaoto.2018.1656 JAMA Network
Dawes P, Cruickshanks KJ, Moore DR, et al. Hearing aids, social isolation, depression, and cognition in older UK adults. PLoS One. 2015;10(3):e0119616. doi:10.1371/journal.pone.0119616 PLOS
ACHIEVE Study Team. The ACHIEVE Study: design and key findings (public dissemination summary). achievestudy.org. Accessed November 10, 2025. Achieve Study
Bottom line for you
If you or someone you love is missing words, avoiding conversations, or turning up the TV, don’t wait for “it to get worse.” A straightforward hearing evaluation and timely, well-fitted hearing aids can restore daily clarity—and they’re a sensible, evidence-supported step for long-term brain health.
David S. Klein, MD, FACA, FACPM
1917 Boothe Circle, Suite 171
Longwood, Florida 32750
Tel: 407-679-3337
Fax: 407-678-7246















