Head of Online Medical Content
Audiology Expert & Founder of Hearing Aid UK

Overview | What it looks like on an audiogram | What causes it? | What can help? | Conclusion and FAQs
Last Hearing Aid UK Update: 09/11/2026
Ski-slope hearing loss is a pattern of hearing loss where hearing is close to normal for low-pitched sounds but drops away sharply for high-pitched sounds. It gets its name from the shape it makes on an audiogram, the chart produced during a hearing test: a line that starts high on the left and slopes steeply down to the right, rather like a ski run.
It’s a common reason people say, “I can hear you, I just can’t make out what you’re saying.” Voices still sound loud enough, but the crisp detail that makes words clear goes missing. The good news is that modern hearing aids can be set up specifically for this pattern.
During a hearing test, an audiologist records the quietest sound you can hear at each pitch, from low on the left of the chart to high on the right. The lower a result sits, the louder that sound had to be.
With ski-slope hearing loss, results sit in or near the normal range for the low pitches, then fall steeply through the higher ones. How steep the drop is affects which hearing aid set-up is likely to suit you.
Not sure what your own audiogram shows? Our HCPC-registered audiologists will talk you through your results during your appointment.
Vowel sounds such as ‘a’, ‘o’ and ‘u’ are lower in pitch and carry most of the volume of speech. Consonants such as ‘s’, ‘f’, ‘t’ and ‘th’ are higher pitched and quieter, but they carry much of the meaning. Age UK notes that most people with age-related hearing loss notice these high-frequency sounds disappearing first.
The most common causes are gradual changes linked to ageing and long-term exposure to loud noise. The NHS lists both as possible causes of gradual hearing loss in both ears.
The tiny hair cells in the inner ear that pick up high-pitched sounds tend to be affected first, which is why the slope usually starts on the right-hand side of the audiogram. If your hearing has changed gradually, your GP is a good first port of call.
If your hearing changes suddenly, in one or both ears, or gets noticeably worse over a few days or weeks, ask for an urgent GP appointment or contact NHS 111. Do the same if you have hearing loss along with earache or discharge from the ear. Sudden changes need medical attention quickly.
Hearing loss linked to age or noise is usually permanent, but hearing aids can be programmed to help bring back high-pitched detail while leaving the sounds you still hear well largely alone. How much they help depends on how much high-pitch hearing you still have. Depending on your results, your audiologist may consider:
The right approach depends on your slope and lifestyle, and your audiologist decides it with you after your hearing test.
Because Hearing Aid UK has no manufacturer bias, your audiologist can choose from all the leading brands to match the shape of your hearing loss. Fitting and fine-tuning always take place in person, at a local hearing clinic or during a free home visit.
“People with ski-slope hearing loss often tell us they can hear perfectly well, it’s just that everyone mumbles. That’s because the volume is still there but the clarity has gone.
The good news is that this is a pattern we can usually set hearing aids up for carefully, helping to bring back the high-pitched detail without making everything louder."
Paul Harrison, Audiology Expert & Founder, Hearing Aid UK
Ski-slope hearing loss explains one of the most frustrating parts of a hearing change: knowing someone is talking but not catching what they say. The problem isn’t volume; it’s the high-pitched detail that gives words their shape, and that detail tends to fade so gradually that many people put it down to others mumbling.
The encouraging part is that this pattern shows up clearly on an audiogram, so it’s easy to identify, and hearing aids can be set up around it.
If you can hear people talking but not what they’re saying, a free hearing test will show exactly where your hearing slopes away. Your audiologist will explain what the results mean for you, and there’s no obligation. If hearing aids aren’t right for you, your audiologist will say so.
If hearing aids would help, Hearing Aid UK’s HCPC-registered audiologists can choose from all the leading brands. They'll fit and fine-tune your hearing aids in person, either at one of our 93+ clinics or during a free home visit. Aftercare for life is included as standard.
It’s part of why we’re Which? recommended and trusted by over 31,000 customers. If voices have started to sound mumbled, it’s worth finding out why. Call us free on 0800 567 7621 or book your free hearing test online.
✔️ Ski-slope hearing loss means near-normal hearing for low pitches but a steep drop for high pitches. The name comes from the shape on your audiogram.
✔️ Speech sounds loud enough to hear, but it is unclear. You keep the vowels but miss consonants like ‘s’, ‘f’ and ‘th’, so people seem to mumble.
✔️ Ageing and noise exposure are the most common causes. Sudden changes, or hearing loss with earache or discharge, need an urgent GP appointment or NHS 111.
✔️ Hearing aids can be set up for this pattern. Open-fit RIC hearing aids and frequency lowering are common options, chosen by your audiologist after a hearing test.
✔️ Bottom line: if you can hear people but not their words, book a free hearing test.
What is ski-slope hearing loss? If you have ski-slope hearing loss, deep sounds like a passing lorry or the rumble of a man’s voice are still easy to hear, but high-pitched sounds such as birdsong or the ‘s’ in speech start to fade.
Why does speech sound mumbled? Speech sounds mumbled with ski-slope hearing loss because the high-pitched consonants that make words clear, such as ‘s’, ‘f’ and ‘th’, are harder to hear, while the louder, lower-pitched vowels still come through.
What causes ski-slope hearing loss? Ski-slope hearing loss is most often linked to ageing and long-term exposure to loud noise, which tends to affect the inner ear’s ability to pick up high-pitched sounds first.
Can hearing aids help with ski-slope hearing loss? Hearing aids can help with ski-slope hearing loss because they can be programmed to mainly boost the high-pitched sounds you’re missing, and a qualified audiologist will advise whether they’re right for you after a hearing test.
Where can I get a hearing test for ski-slope hearing loss? Hearing Aid UK offers free hearing tests with HCPC-registered audiologists at 93+ clinics across the UK or during a free home visit, and you can book by calling 0800 567 7621.
If people seem to mumble or conversations feel like hard work, a free hearing test will show whether your hearing has changed and where it slopes away.
One of our HCPC-registered audiologists will check your hearing in person, either at one of our 93+ local clinics or during a free home visit, and explain your results in plain English. There’s no obligation to buy anything.
What Is Ski-Slope Hearing Loss?
I Struggle to Hear on Video Calls
I can’t hear people in the car Do not spend hundreds of pounds without getting a second opinion from us.
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. Find out more about our warranty cover here
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 an HCPC-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.