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Audiology Expert

Overview | What is it? | Symptoms | Causes | Treatment | Living with it | Conclusion
Last Hearing Aid UK Update: 31
Unilateral hearing loss, where one ear is affected while the other hears normally, is more common than most people expect, and can develop at any age and stem from a range of causes, including infections, trauma, tumours, genetics, or ageing.
Those affected often struggle to locate sounds or follow conversation in noisy settings. It's the kind of thing you might first notice in a busy pub, barely catching a word on one side, but turning your head and suddenly hearing fine. These small clues are often worth taking seriously.
Treatment depends on the cause and can include hearing aids, cochlear implants, or auditory rehabilitation. As with most hearing conditions, catching it early makes a significant difference.
Hearing loss in one ear, also known as unilateral hearing loss or single-sided deafness (SSD), can be frustrating and sometimes isolating. However, there's no need to worry too much, as this condition isn't always permanent and there are many treatment options available.
Single-sided deafness (SSD) specifically refers to profound or total hearing loss in one ear, whilst unilateral hearing loss is the broader term that includes mild to moderate hearing reduction in one ear.
Understanding this distinction helps when discussing treatment options with your audiologist.
There are also several strategies you can use to make daily life easier. In this short article, we briefly take a look at the main symptoms, causes, treatments, and how to live with unilateral hearing loss.
It can be disorienting when you can’t tell which direction a car is coming from, or you misjudge where your phone is ringing. Every day, moments like these can make unilateral hearing loss particularly noticeable and inconvenient.
The "head shadow effect" is a major challenge with unilateral hearing loss. Your head physically blocks sound waves trying to reach your affected ear from the opposite side, making it especially difficult to hear someone speaking on your "bad side" in noisy environments.
This is why people with unilateral hearing loss instinctively position themselves to keep their good ear facing the action.
Unilateral hearing loss only affects one ear, thus making it easier to notice early symptoms. These symptoms can vary, but common ones include:
You might find yourself shifting to always sit with your ‘good ear’ facing friends in a restaurant, or cranking the TV up even when others say it’s already loud. These are subtle signs that shouldn’t be ignored.
There are various reasons you might experience unilateral hearing loss, including:
Some people notice symptoms after flying, swimming, or even waking up with a sudden feeling of pressure or ringing in one ear. In these cases, prompt medical advice is vital.
Severe or profound unilateral hearing loss can be permanent, depending on its cause. For instance, if your single-sided deafness (SSD) is caused by a perforated eardrum, it is unlikely to be fixable.
However, if the hearing loss is due to impacted earwax, treatment can likely improve your hearing.
The key is not to wait it out; many assume it’ll clear on its own, but delays could make things worse. Seeing a GP or audiologist quickly is always best.

While there is no cure for unilateral hearing loss, depending on the cause, several treatment options can restore some or even all hearing to the affected ear.
For irreversible hearing loss, options such as auditory implants or hearing aids can enhance hearing capabilities. Other treatment possibilities include:
Bone conduction hearing aids, which transfer sound through the skull to the better-hearing ear, can be life-changing, especially for those with SSD who’ve struggled to hear their children in the back seat while driving.
If you have unilateral hearing loss and struggle to hear conversations amid background noise, a hearing aid can help amplify the sounds you're missing.
For current hearing aid wearers, assistive devices like remote microphones are excellent in noisy environments, as they amplify speech sounds directly into the hearing aids.
Some users report that streaming phone calls or music directly into their hearing aid has made commuting on packed trains far more manageable, cutting out much of the background clatter.
Traditional hearing aids work well if you have some residual hearing in the affected ear, but they won't help with profound single-sided deafness. This is where CROS and BiCROS systems become invaluable.
How CROS hearing aids work: CROS stands for Contralateral Routing of Signal. A small microphone worn on your deaf ear picks up sounds and wirelessly transmits them to a hearing aid on your better-hearing ear.
This eliminates the head shadow effect and allows you to hear conversations and sounds from your "bad side" without constantly repositioning yourself.
How much unilateral hearing loss affects daily life really depends on its severity. The good news is that small, practical changes can go a long way. Being upfront with people about your hearing, asking them to face you when they speak and directing their voice to your hearing side, removes a lot of unnecessary guesswork.
During conversations, reducing background noise where you can helps significantly, and thinking about where you sit in social settings (your stronger ear towards the group at dinner, for example) is a simple habit worth getting into.
On video calls, streaming directly to a hearing device or using headphones can make a noticeable difference to clarity. At work, a quiet word with your employer about small adjustments, a different desk, a better headset, can improve both comfort and focus without much fuss.
Connecting with a support group, whether online or in person, is also worth considering; hearing from others in the same situation can be genuinely reassuring and full of practical insight.
Unilateral hearing loss is more manageable than many people expect, but it does need attention. Struggling to hear in noisy environments or finding it hard to work out where sounds are coming from can quietly take its toll on daily life. Causes vary widely, from something as straightforward as a blockage to an infection or something more complex underneath.
There's a lot that can be done. Treatment options range from hearing aids to surgery, and in the meantime, small changes, such as cutting down background noise, communicating your needs to those around you, and getting the right support, can make a real difference day to day.
It's easy to write off one-sided hearing loss as something that'll sort itself out, or convince yourself it's not serious enough to act on. But the sooner you get a proper diagnosis, the more doors are open to you. If something doesn't feel right, your GP is the best first step — they can refer you to an audiologist if needed.
If you've noticed you're struggling to hear in noisy places, finding it hard to locate sounds, or constantly turning your head to favour one ear, it's worth getting it looked at. These things are easy to dismiss — but they're also easy to address with the right help.
Book a free hearing assessment and find out what's going on. Our audiologists will test both ears, get to the bottom of the issue, and talk you through the best options for your situation. Available in clinic or at home, with no waiting lists and no obligation.
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Not only are the prices great, but the service is fantastic! Many thanks to your team.In general, any audiologist will always recommend to you the hearing aid model that best suits your needs. Here is a useful checklist to make sure that is the case.
If you have significant hearing loss in both ears, you should be wearing two hearing aids. Here are the audiological reasons why:
Localisation: The brain decodes information from both ears and compares and contrasts them. By analysing the minuscule time delays as well as the difference in the loudness of each sound reaching the ears, the person is able to accurately locate a sound source.
Simply put, if you have better hearing on one side than the other, you can't accurately tell what direction sounds are coming from.
Less amplification is required: A phenomenon known as “binaural summation” means that the hearing aids can be set at a lower and more natural volume setting than if you wore only one hearing aid.
Head shadow effect: High frequencies, the part of your hearing that gives clarity and meaning to speech sounds, cannot bend around your head. Only low frequencies can. Therefore, if someone is talking on your unaided side, you are likely to hear that they are speaking, but be unable to tell what they have said.
Noise reduction: The brain has its own built-in noise reduction, which is only really effective when it is receiving information from both ears. If only one ear is aided, even with the best hearing aid in the world, it will be difficult for you to hear in background noise as your brain is trying to retain all of the sounds (including background noise) rather than filtering them out.
Sound quality: We are designed to hear in stereo. Only hearing from one side sounds a lot less natural to us.
Fancy some further reading on this topic? You can read about why two hearing aids are better than one in our article, hearing aids for Both Ears, here
For most people, the main benefit of a rechargeable hearing aid is simple convenience. We are used to plugging in our phones and other devices overnight for them to charge up. Here are some other pros and cons:
For anybody with poor dexterity or issues with their fingers, having a rechargeable aid makes a huge difference, as normal hearing aid batteries are quite small and some people find them fiddly to change.
One downside is that if you forget to charge your hearing aid, then it is a problem that can't be instantly fixed. For most, a 30-minute charge will get you at least two or three hours of hearing, but if you are the type of person who is likely to forget to plug them in regularly, then you're probably better off with standard batteries.
Rechargeable aids are also a little bit bigger and are only available in Behind-the-Ear models.
Finally, just like with a mobile phone, the amount of charge you get on day one is not going to be the same as you get a few years down the line. Be sure to ask what the policy is with the manufacturer's warranty when it comes to replacing the battery.
For most people, the answer is yes. But it's never that simple.
The majority of hearing problems affect the high frequencies a lot more than the low ones. Therefore, open fitting hearing aids sound a lot more natural and ones that block your ears up can make your own voice sound like you are talking with your head in a bucket. Therefore, in-ear aids tend to be less natural.
However, the true answer is we can't tell until we have had a look in your ears to assess the size of your ear canal, and until we have tested your hearing to see which frequencies are being affected.
People with wider ear canals tend to have more flexibility, also there are open fitting modular CIC hearing aids now that do not block your ears.
There is also the age-old rule to consider, that a hearing aid will not help you if it's sat in the drawer gathering dust. If the only hearing aid you would be happy wearing is one that people can't see, then that's what you should get.
Most people can adapt to any type of hearing aid, as long as they know what to expect. Have an honest conversation with your audiologist as to what your needs are.
Generally speaking, six or more. Unless it's none at all. The number of channels a hearing aid has is often a simplistic way an audiologist will use to explain why one hearing aid is better than another, but channels are complex, and it is really not that straightforward. Here are some reasons why:
Hearing aids amplify sounds of different frequencies by different amounts. Most people have lost more high frequencies than low, and therefore need more amplification in the high frequencies. The range of sounds you hear is split into frequency bands or channels, and the hearing aids are set to provide the right amount of hearing at each frequency level.
Less than six channels, and this cannot be done with much accuracy, so six is the magic number. However, a six-channel aid is typically very basic with few other features and is suitable only for hearing a single speaker in a quiet room. The number of channels is not what you should be looking at; it's more the rest of the technology that comes with them.
As a final note, different manufacturers have different approaches. One method is not necessarily better than any other. For example, some manufacturers have as many as 64 channels in their top aids. Most tend to have between 17 and 20. One manufacturer has no channels at all.
Manufacturer's warranties typically last between 2-5 years, depending on the brand and model, and cover defects in materials and workmanship. This includes repairs for component failures, electronic malfunctions, and manufacturing defects, but excludes damage from misuse, accidents, or normal wear. Most manufacturers also include loss and damage insurance for the first year.
We handle all warranty claims on your behalf, liaising with manufacturers and ensuring you get replacement devices quickly when needed. This comprehensive warranty coverage, combined with our lifetime aftercare, gives you complete peace of mind.
Our hearing tests are completely free, whether at our clinics or in your home. Unlike other providers who charge £30-£100 for home visits, we believe hearing healthcare should be accessible without financial barriers. Our comprehensive assessments include examination by a registered audiologist, audiogram results, and personalised recommendations.
All testing, future adjustments, and ongoing support are included at no extra cost. While NHS tests are also free, typical 6-week waiting periods often lead people to seek immediate private testing. We provide prompt, professional assessments that fit your schedule and budget.
Yes, we offer completely free home visits throughout the UK, and this service is included in our prices with no additional charges. Home visits are particularly valuable for people with mobility issues, busy schedules, or those who simply prefer the comfort and convenience of their own environment.
Our audiologists can conduct full hearing tests, fit hearing aids, and provide ongoing support in your home. This service sets us apart from many providers who either don't offer home visits or charge extra for them.
We can offer prices up to 40% lower than high street retailers because of our business model. As a network of 200+ independent audiologists, we don't have the massive overheads of large retail chains - no expensive high street premises, no sales targets pushing audiologists to sell the most expensive options, and no costly marketing campaigns.
However, we maintain the same buying power as the big chains because we purchase on behalf of our entire nationwide network. This means you get access to the same premium hearing aids with professional service, but at genuinely competitive prices.
We offer a comprehensive 60-day money-back guarantee, which gives you twice the industry standard time to properly assess whether your hearing aids are right for you. This extended period recognises that adjusting to hearing aids takes time, and your brain needs several weeks to adapt to the amplified sounds.
Unlike many providers who offer just 30 days, we believe 60 days gives you the confidence to test your hearing aids in all the situations that matter to you - from quiet conversations at home to busy restaurants and outdoor activities.
When we refer to a product as 'Latest Launch', we mean it is the latest to be released on the market.
When we refer to a product as 'New', we mean that the product is the newest hearing aid model on the market.
When we refer to a product as 'Superseded', we mean that there is a newer range available which replaces and improves on this product.
When we refer to a product as an 'Older Model', we mean that it is has been superseded by at least two more recent hearing aid ranges.