Sonovo Unison Bone Conduction Sound Amplifier Glasses.
Hearing support and tinnitus relief, in a pair of glasses.
Unison uses bone conduction to deliver amplified sound through gentle vibration at your temples, leaving your ears completely open. Nothing goes in your ear, nothing sits over it, and nobody needs to know you are wearing anything.
Built-in microphones lift the sounds around you, so conversations feel clearer and the room feels less quiet. For people using sound enrichment as part of tinnitus habituation, that matters most in the moments when everything goes still.
Prescription-ready frames. Replaceable batteries, so no charging and no cable.
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5% Donated to Tinnitus UK.
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Prescription-Ready Frames.
Sonovo Unison Bone Conduction Sound Amplifier Glasses.
How Unison works.
Sound normally reaches your inner ear through the air, down the ear canal and across the eardrum. Bone conduction takes a different route. It sends sound as gentle vibration through the bone at your temples, straight to the inner ear, bypassing the eardrum entirely.
That is why your ears stay open. You hear the room, the doorbell, the person next to you, all of it, at the same time.
Why that helps with tinnitus. Tinnitus feels loudest when there is nothing else to hear. Sound enrichment adds a gentle background so the gap between the tinnitus and the silence gets smaller, which gives your attention somewhere else to go. Over time that supports habituation, the process by which your brain gradually stops treating the sound as important.
Habituation is slow and it is not a straight line. Unison is not a cure and nothing is. What it can change is how much of your attention the tinnitus takes.
Unison is not a hearing aid.
It is worth being clear about this, because the two get confused and they do different jobs.
A hearing aid is a medical device. It is prescribed, fitted and tuned to your specific hearing loss by an audiologist, and it corrects what you cannot hear. If you have been told you need one, Unison is not a replacement for it.
Unison is a personal sound amplifier. It lifts the sound already around you and delivers it through bone conduction, and it is built for people using sound enrichment as part of tinnitus habituation. No prescription, no fitting appointment, no audiologist required.
Some people use both. Because nothing goes in or over your ear, Unison does not get in the way of anything else you wear.
Out and about.
Because your ears stay open, you hear the birds, the traffic, the person walking beside you. Nothing is blocked and nothing is replaced. There is just more to listen to than the ringing.
With the people you love.
Conversation is where hearing changes hurt most. Built-in microphones lift the voices around you, so you are following the room rather than working at it.
In your own frames.
Unison frames are prescription-ready. Take them to your optician and they can fit your lenses like any other pair. One thing on your face instead of two.
Unison product details.
Unison Features.
- Open-ear comfort, nothing inside or over the ear
- Discreet, prescription-ready design
- Replaceable PR48 battery, no charging and no cable
- Three volume levels, adjusted on either arm
- Arm length adjustable in five increments across 8mm
- Spare parts available, so small repairs do not mean a new pair
- Lightweight at around 29g
Technical Specifications.
Model: I11A
Speaker: Bone conduction
Frequency Range: 400Hz–4,300Hz
Max Output: ≤105 dB
Gain: 30 ± 5 dB
Total Harmonic Distortion: ≤5%
Input Noise: ≤26 dB
Automatic Noise Reduction: 7 dB
Working Current: 2.3 mA
Battery: PR48 zinc-air, replaceable
Weight: 29 ± 5 g
Product lifespan: 4 years
Usage & Care.
- Replace the PR48 battery when you hear the repeated beep alert.
- Replace both at the same time.
- Power off when not in use, which also extends battery life
- Remove before washing your face, showering, using hair gel, or going out in the rain
- Do not wear during high frequency or ultrasound treatment, in a high temperature spa, or in a thunderstorm
- Wipe with a soft cloth or cotton swab lightly dampened with 70 to 75% medical alcohol, and let it air dry fully
- Keep away from heat and prolonged sunlight, and avoid drops or impact
- Store in the Sonovo protective box when not in use
Warranty & Support.
- 1-year manufacturer warranty (covers non-human damage)
- UK-based customer support
Contact: customercare@sonovo.co.uk
Included in the box.
Sonovo Unison Glasses, Case & Cloth.
Quality Assurance Certificate
PR48 Zinc-Air Battery
User Manual & Warranty Card
Hex Key & Spare Screws
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
Please read our FAQs page to find out more.
Is Unison a cure for tinnitus?
No, Unison isn’t a cure for tinnitus, but it can help reduce how noticeable your tinnitus sounds feel.
By delivering gentle sound through bone conduction, Unison helps your brain focus on external sound instead of internal noise, supporting the natural process of habituation.
Can I wear Unison with a hearing aid?
Yes. Nothing goes in or over your ear, so Unison does not get in the way of anything else you wear. Some people use both, and if you have been told you need a hearing aid, Unison is not a replacement for it.
How long does the battery last, and what happens when it runs out?
You will hear a repeated beep when the battery is low. Swap in a new PR48 zinc-air battery and you are away again in seconds. There is no charging and no cable, so there is nothing to remember at bedtime. If you wear a vibrator on both sides, replace both batteries at the same time.
What if something breaks?
Most small problems are fixable rather than fatal. The arms adjust, the battery cover comes off, and we keep the parts that wear in stock. A replacement battery cover is around £1 and a screwdriver and screw set is around £3, so a small repair costs a couple of pounds rather than a new pair. Email customercare@sonovo.co.uk and we will help.
How does bone conduction help with tinnitus?
Bone conduction sends sound vibrations directly through your cheekbones to your inner ear, bypassing the eardrum.
This helps keep your hearing system active and reduces the contrast between tinnitus and silence, a key factor in long-term relief.
Can I still hear my surroundings while wearing Unison?
Yes! Unison’s open-ear design keeps your ears free, so you can hear the world around you naturally while still experiencing relief.
You’ll stay aware of conversations, traffic, and background sounds.
Can I use Unison with prescription lenses?
Absolutely. Unison frames are prescription-ready, and your optician can fit your lenses into the frame just like any regular pair of glasses.
How long does it take to notice results?
Honestly, it varies a lot.
Some people notice a difference in the first week. For others it takes considerably longer, and some find it does not suit them at all.
What Unison supports is habituation, the process by which your brain gradually stops treating the tinnitus as important. That is slow, it is not a straight line, and there will be days that feel like going backwards. Those days are normal and not a sign it is failing.
It is also not a cure. Nothing is. What can change is how much of your attention the tinnitus takes.