The relationship between hearing loss and brain health has gained a lot of attention over the last few years. In this article we will look at what we currently know about this important topic.
We will explore why, left untreated, hearing loss seems to be linked to poorer brain health and higher rates of dementia.
We will discuss what can be done to reduce the risk of poorer brain health and we will outline the steps needed to detect hearing loss, especially in its early stages.
By Paul Shaw, MSc, Clinical Scientist (Audiology) and Registered Hearing Aid Dispenser. February 2026
Key Takeaways:
- Emerging evidence shows a link between untreated hearing loss and cognitive decline (poor brain health)
- Hearing loss leads to structural changes in the brain, increased listening effort and increased social isolation.
- Treating hearing loss can potentially help reduce cognitive decline
What is dementia?
Dementia is a group of symptoms that can affect memory, problem-solving, language, and behaviour, making it hard for someone to carry out activities alone. Alzheimer’s disease is the most common type of dementia.
Is hearing loss a big problem in the world?
Yes, the World Health Organization (WHO) states that hearing loss is the third leading cause of disability worldwide.
Hearing loss and brain health
Hearing loss has long been considered a normal part of ageing. In recent years, however, research has revealed a much broader impact, showing that it plays a significant role in cognitive, emotional, and overall health. Increasingly, hearing loss is understood not simply as a sensory issue, but as an important factor in brain health.
A growing body of evidence links hearing impairment to faster cognitive decline, a higher risk of dementia, and measurable changes in brain structure and function. This has led to an important question: could identifying and treating hearing loss early help preserve cognitive function and delay, or even prevent, dementia?
Emerging research suggests that both biological and social factors contribute to this relationship, offering new insights for clinical care and prevention.
What do we know about the effect of hearing loss on brain health
Large population studies consistently show that people with hearing loss are more likely to experience cognitive decline than those with normal hearing. This suggests that hearing loss may be a modifiable risk factor, one that, if addressed early, could reduce the risk of long-term cognitive impairment.
While the link is clear, the reasons behind it are complex. Researchers believe that several interconnected mechanisms are involved:
- Sensory deprivation: If the auditory system receives less input (sound) then corresponding brain regions also receive less input (electrical brain activity), particularly the auditory cortex (the area of the brain responsible for making sense of the sounds we hear). This lack of input can lead to structural changes in this area of the brain.
- Cognitive factors: If more ‘effort’ is required to listen (due to untreated hearing loss), then there is a hypothesis that the brain has to borrow some resources from other parts of the brain.This comes at the expense of these other areas in the brain. Subsequently, less ‘brain power’ is available for processes such as memory coding and reasoning. Simply put, if the brain works harder at listening, it might work less well at other tasks.
- Social factors: Left untreated, hearing loss often slowly leads to social isolation and poorer emotional health. This includes things like depression, anxiety, and low mood. These are all risk factors for cognitive decline, especially social isolation.
- Shared mechanisms: There is some evidence that cognitive decline and hearing loss for some people is due to shared underlying causes. Things like vascular disease, inflammation and genetic susceptibility may drive both hearing loss and cognitive decline.
Together, these pathways help explain how hearing loss may influence brain health.
A key concept in understanding this relationship is cognitive reserve which is the brain’s ability to cope with damage or decline without showing symptoms. Hearing loss may gradually reduce this reserve by limiting sensory input, increasing cognitive strain, and decreasing social and intellectual engagement. Over time, this can make individuals more vulnerable to conditions such as dementia.
This framework also explains why some people with hearing loss experience significant cognitive decline, while others remain relatively unaffected.
Clinical Implications
The link between hearing loss and cognitive decline has important implications for healthcare.
Early detection is critical. Hearing loss is often identified before noticeable cognitive symptoms appear, placing audiologists and other ear professionals in a unique position to intervene early and potentially protect long-term brain health.
Integrating hearing assessments into routine cognitive health checks could enable earlier identification of at-risk individuals. In addition, growing evidence suggests that hearing rehabilitation, such as hearing aids, cochlear implants and auditory training, may help slow cognitive decline by:
- Reducing the mental effort required to hear
- Supporting social interaction
- Helping maintain cognitive reserve
While research is ongoing, these findings highlight the potential benefits of treating hearing loss not just for hearing, but for overall brain health.
What we recommend for hearing and brain health
At a minimum we recommend thinking about hearing tests like eye tests. Plan for them, get them regularly and take the advice of your audiologist.
A hearing test will usually take around 30 minutes and will involve an ear health check, tests on the mechanical function of your ears and detailed testing of how well you hear a range of test frequencies in each ear. Your audiologist may also carry out speech tests in which you listen to words or sentences, often in the presence of background noise, which makes the task more difficult.
These speech tests can be really useful to determine how your hearing is likely to affect you in day-to-day life.
From this set of tests, your audiologist will be able to make recommendations to you. This could be to simply get another test in a few years’ time or they may suggest a trial of hearing devices if they feel they will help you.
It is unfortunate that for many people, there still remains a stigma surrounding hearing aids. I often hear clients say things like, “I am coping well enough, I don’t think I need hearing aids” or “I think for now I will leave it and get back to you when I am finding it more difficult”
Whilst a person may be “coping”, they are probably listening with more effort, possibly withdrawing from some conversations and ultimately not hearing as well as they could be.
Modern hearing devices, when set up well, can be life-changing. And for some of my clients, who were coping well without them, they report hearing so much better and with much less effort than before. They notice more sounds, feel more connected to life, and generally have a much better quality of life with their hearing devices than without.
What’s more, they are actively taking steps to not only improve their hearing but also maintain their brain health.
What is the take-home message?
Hearing loss is one of the most significant health issues in the world. Left untreated, hearing loss can lead to social withdrawal, reduce a person’s quality of life and is linked to poorer brain health. Modern hearing aids are incredibly beneficial and can significantly improve a person’s hearing, enhance their quality of life, and potentially reduce the risk of cognitive decline.
If you haven’t had a hearing test and you are over 50, just book online to find out about your hearing. You may have fantastic hearing, or you may have a mild hearing loss. Whatever we find, we will talk through your results with you, and you will leave in a better position to know how to plan for your future hearing care.
Call us on 0113 8730444 or book your hearing test onlone today.