What is Asymmetric Hearing Loss?: The uneven hearing loss and its causes, treatments, and challenges

What is Asymmetric Hearing Loss?

 Causes, challenges, and what can help

Introduction   |  What is asymmetric hearing loss?    |  Causes    |  How it's checked  |  What can help  | Hearing aids for asymmetric hearing loss    |  Living with asymmetric hearing loss   | Conclusion

Last Hearing Aid UK Update:  16/10/2026

An uneven hearing loss between the ears

Asymmetric hearing loss is when there’s a noticeable gap between how well each ear hears. It can be caused by infections, trauma, a rare non-cancerous growth on the hearing nerve, or Meniere's disease, and it often shows up as difficulty recognising where sounds are coming from, or following speech in a noisy room.

One thing worth knowing straight away: if hearing loss in one ear comes on suddenly, over hours or a day or two, the NHS advises asking for an urgent GP appointment or contacting NHS 111 straight away.

Sudden sensorineural hearing loss is time-sensitive, and getting seen quickly can make a real difference to the outcome. NICE guidance says people with sudden hearing loss that started within the last 30 days should be seen by a specialist within 24 hours.

The quiet battle

Our senses play a vital role in finding our way through our daily lives. Hearing lets us join in conversations, lose ourselves in music, and stay tuned in to the world around us. But what happens when one ear starts to pick things up differently from the other?

This is known as asymmetric hearing loss (AHL) and can quietly interfere with everyday life. You might be trying to follow a conversation in a busy cafe, for example, but struggle to pick out words, not realising your hearing is uneven.

Many people never mention it, because it's easy to write off as "one ear's just a bit worse than the other." But your better ear may be working harder to make up the difference. Over time, that constant strain can tip into listening fatigue, leaving you worn out by the end of the day.

In this article, we take a closer look at what causes uneven hearing loss and how HCPC-registered audiologists can help you find the right support.

What is it?

Asymmetric hearing loss is when one ear hears noticeably differently from the other. That's different from symmetric hearing loss, where both ears are affected in much the same way, and the size of the gap between ears can vary a lot from person to person. 

Clinically, hearing is usually described as asymmetric when there’s a difference of 15 dB or more between the ears at two neighbouring test pitches, according to NICE.

In some cases, one ear may have perfectly normal or near-normal hearing while the other has anything from a mild to a profound loss. This can actually make things trickier to spot, because the stronger ear often compensates in everyday listening, masking just how much the other ear is struggling.

For most people with hearing loss, both ears are affected to a fairly similar degree. If a hearing test shows a significant difference between ears, your audiologist may refer you to an ENT specialist before considering hearing aids.

That's because an uneven result can sometimes point to something else going on, and in some cases, that's something a GP or specialist can help with, and occasionally reverse.

How asymmetric hearing loss affects you day-to-day will depend on the degree of difference between your ears. Certain everyday situations can become particularly difficult, crossing a busy road, for instance, or trying to follow a conversation in a noisy room.

How asymmetric hearing loss impacts daily life

Asymmetric hearing loss can have a strong effect on quality of life as communication becomes challenging and sound localisation, together with clarity, is compromised.

Keeping up with a conversation can be exhausting, and social occasions can start to feel like something to get through rather than enjoy. Over time, this can mean people quietly step back from situations they used to love, and that can take its toll on confidence and mental wellbeing.

Picture sitting at a family gathering, trying to follow the conversation, only to realise the people on one side of you might as well not be speaking at all. You end up asking people to repeat themselves again and again, which gets awkward and tiring, fast.

One of the most significant and often underestimated challenges of asymmetric hearing loss is working out where sounds are coming from. Busy streets, crowded restaurants, noisy offices: these kinds of environments can quickly become overwhelming when your ears aren't giving you a consistent picture.

It can also raise real safety concerns. Sounds that most people pick up on automatically, such as an oncoming car or a smoke alarm, can be surprisingly easy to miss. Which is exactly why getting the right assessment and finding a solution that's tailored to you makes such a difference.

Causes of asymmetric hearing loss

There are a number of things that can cause asymmetric hearing loss, such as:

• Acoustic neuroma: Also called a vestibular schwannoma, this is a non-cancerous growth on the nerve used for hearing and balance. It usually causes hearing loss in one ear, often with tinnitus or dizziness.
• Sudden sensorineural hearing loss (SSNHL):  A type of hearing loss that arrives suddenly and usually in one ear rather than both. This is a medical emergency: if this happens to you, contact your GP or NHS 111 straight away rather than waiting to see if it settles, as being seen quickly can improve the outcome.

Pinning down the exact cause can be difficult, though viral infections, autoimmune conditions, and circulation problems have all been linked to it, and often no clear cause is found.

• Meniere's disease:  An inner ear condition that can bring vertigo, tinnitus, and hearing loss together, and one worth taking seriously, as the hearing loss can become permanent if it isn't properly managed.

The NHS explains that hearing may gradually get worse over time, so it’s worth taking seriously and getting checked by your GP.

• Noise exposure: Loud noise over a prolonged period doesn't always damage both ears the same; if one ear is consistently more exposed, it may bear the brunt.
• Otosclerosis: An unusual bone growth in the middle ear can get in the way of sound reaching the inner ear. It can affect one or both ears, and because it tends to come on gradually over several years, it’s easy not to notice at first.
• Ear infections and injury: A stubborn ear infection or a knock to the head can damage one ear more than the other, leaving you with a noticeable difference between the two sides.

Over time, the gap can grow too. Age-related changes, or hearing loss that’s been left unchecked for years, can slowly make one ear fall further behind.

Asymmetric Hearing Loss

What can help?

How is asymmetric hearing loss checked?

Working out what's behind asymmetric hearing loss usually takes a proper evaluation from an audiologist or ENT specialist. There's no single test that gives you all the answers, so they'll typically look at things from a few different angles.

That starts with your hearing itself: a series of tests to measure exactly how much loss there is in each ear and what kind it is. Bone conduction testing often comes into play, helping the specialist figure out whether the issue lies in the outer/middle ear, the inner ear, or both.

If there's reason to look deeper, imaging such as an MRI or CT scan may be recommended. These can reveal structural causes that wouldn't show up in a hearing test alone, such as a tumour on the hearing nerve, for example. That’s why NICE recommends that specialists consider an MRI scan when the difference between ears is significant.

Blood tests can help rule out any underlying conditions that might be involved, and your medical history will give your specialist a useful background. If you've had any dizziness, vertigo, or balance problems, mention these too; they can be more relevant to your hearing than you might expect.

None of these medical checks falls to Hearing Aid UK. We're a hearing healthcare service, not a medical practice, so identifying and managing underlying conditions like tumours, infections, or Meniere's disease is a job for your GP or ENT specialist.

Where our HCPC-registered audiologists come in is afterwards: once any medical cause has been ruled out or dealt with, and you're ready to look at hearing aids or other support.

What can help with asymmetric hearing loss?

Once you know what's causing the difference between your ears, support tends to come from two directions: your GP or ENT specialist can look into the cause itself, while an audiologist can help you manage your hearing day to day.

From your GP or ENT specialist, this might include:

• Medication: If the cause turns out to be something like sudden sensorineural hearing loss (SSNHL) or Ménière's disease, medication may help keep symptoms in check and make day-to-day life a little easier.
• Surgery: Where a tumour or structural issue is the cause, surgery may be an option your specialist discusses with you.

From an HCPC-registered audiologist, once any medical cause has been addressed:

• Hearing aids: Professionally fitted hearing aids amplify sound to make listening easier and less effortful. When it comes to asymmetric hearing loss, audiologists will often recommend fitting both ears, even if one is considerably better than the other. Having both ears aided helps maintain spatial hearing and goes some way towards offsetting the head shadow effect.

The difference this can make in day-to-day life is real. Something as simple as following a conversation while driving can become far less of a struggle when both ears are working together.

• BiCROS hearing aids: If the hearing in your weaker ear is too limited for a hearing aid to help, a BiCROS system can pick up sound on that side and send it to a hearing aid on your better ear.
• Cochlear implants: For profound hearing loss, a cochlear implant might be suggested. These are electronic devices that bypass the damaged part of the ear and stimulate the auditory nerve directly, and they're assessed and provided through a specialist NHS audiology or ENT team, not something available through a standard hearing aid provider.

They’re generally only considered when both ears have severe to profound hearing loss and hearing aids don’t give enough benefit, so they’re rarely an option when one ear still hears well.

Which route is right for me? As a general guide, if the cause is infection, structural, or tumour-related, your GP or ENT team leads first.

Once that's settled, or if the cause is age-related or noise-related rather than medical, an audiologist can assess whether hearing aids would help. Your audiologist will talk you through which applies to your situation.

• Routine check-ups: Because asymmetric hearing loss may evolve, ongoing follow-up with your GP, ENT specialist, or audiologist is often advised to track changes and re-evaluate what's helping.

Fitting hearing aids for asymmetric hearing loss

What's suitable for you will depend on the cause and severity of your hearing loss. Depending on your hearing, options include hearing aids, BiCROS systems and, through specialist NHS services, bone-anchored hearing devices.

Fitting hearing aids for AHL can be a more involved process. You may find that at first, the balance between both ears feels strange. This is normal, especially when one ear has much better residual hearing than the other.

Getting the hearing aid settings right can take a little time, and your audiologist may need to make a few adjustments along the way. Try to be patient with the process; giving your brain time to adapt to hearing things differently really does make a difference. 

This is included as part of the aftercare for life that comes with any hearing aid fitted through Hearing Aid UK, so there's no extra cost for these follow-up adjustments.

This type of hearing loss can be more complex, and finding the right solution could entail some trial and error. It can sometimes take several appointments before you reach a “sweet spot” in the programming.

The aim is to balance the sound reaching each ear as much as possible, though the bigger the difference between ears, the more complex it can be to achieve.

Modern hearing aids can often be adjusted by an audiologist to accommodate the differences between your ears. However, if the hearing loss is severe in one ear or if one ear is completely normal, a CROS hearing aid or bone-anchored hearing devices (arranged through specialist NHS services) might be a better option.

Using a hearing-aid programme with directional microphones and noise reduction can help compensate for the “weaker” ear, especially in difficult settings.

The effort will pay off. Over time, wearing hearing aids in both ears can help you work out where sounds are coming from more easily. Better spatial hearing doesn’t just help with conversation; it also supports safety in daily life (e.g. judging where sound is coming from).

"Asymmetric hearing loss is one of the cases where patience really pays off. It's rarely a quick fix; getting the balance right between two ears that hear so differently can take a few visits, and we always tell people that's normal, not a sign something's wrong.

Once we get there, the improvement in things like knowing where a sound is coming from, or following a conversation across a table, is often bigger than people expect."

Paul Harrison, Audiology Expert & Founder, Hearing Aid UK

Living with asymmetric hearing loss

Adapting to life with asymmetric hearing loss requires different approaches. Below are some strategies that can help:

• Try a few simple communication tricks: turning so your better-hearing ear faces the sound, picking up on visual cues like facial expressions, and cutting down on background noise can all make conversations that bit easier.

For example, in a meeting at work, sitting so that the better ear is facing the speaker will help ensure you hear them clearly. Also, you might gently ask family or colleagues to face you when speaking, which can help quite a lot.

• Assistive listening devices: Things like FM systems and loop systems (which pick up sound directly from a speaker or source and send it straight to your hearing aid) can make a real difference in specific settings, like meetings or places of worship.

It's also worth asking your audiologist about remote microphones or Bluetooth receivers, which can be particularly helpful if you're relying more on one ear.

• Support networks: Talking to others who understand what it's like to hear unevenly, day in and day out, can make a real difference to how you feel.  If you'd like to read more, RNID has further information on living with hearing loss day to day.

• Safety planning:  Since it can be harder to tell which direction sounds are coming from, it's worth taking a little extra care when crossing roads, driving, or moving through busy areas. At home, visual warning systems, like flashing fire alarms, are worth considering if you feel they'd be useful.
• Keep a note of tricky moments: it doesn't need to be anything formal, just a quick note of when and where listening feels hardest. It might seem like a small thing, but these little details can make a big difference, helping your audiologist fine-tune your hearing aid settings and get the balance between your ears just right.

Conclusion

Asymmetric hearing loss doesn't always get the attention it deserves, but for people who have it, it can have a big effect on their daily lives. The good news is that there is a lot that can be done, and getting a specialist involved sooner rather than later really does make a difference, particularly if your hearing loss came on suddenly, in which case asking for an urgent GP appointment or contacting NHS 111 matters.

For anyone noticing a gradual difference between their ears, our HCPC-registered audiologists offer a free, no-obligation hearing test at one of our 93+ clinics or in the comfort of your own home. Call us free on 0800 567 7621, or book your free hearing test online.

Modern hearing aids and assistive devices have come a long way, and many people with AHL find they're able to regain confidence and feel much more in control of how they hear the world around them.