Custom Hearing Aids: Made to Fit Your Ear
Custom hearing aids, also called custom-made or custom-moulded hearing aids, are devices built from an impression of your own ear, so the whole aid is shaped to fit you and sits neatly inside your ear with no part behind or on top. They are not a single device but a family of four in-the-ear styles, from the larger ITE and ITC down to the tiny, near-invisible CIC and IIC. This guide explains what custom hearing aids are, how they are made, the benefits and drawbacks shared across the family, and how the four styles differ, so you can see which might suit you before choosing.
What are custom hearing aids?
Are hearing aids custom made? Many are. A custom hearing aid, also known as a custom-made, custom-moulded or custom-fit hearing aid, is a device built from an impression or a 3D scan of your ear, so its shell is shaped to your ear alone. The whole aid, all of its electronics included, sits inside the ear rather than behind it, which is what separates the custom family from behind-the-ear and receiver-in-canal styles.
Because each one is moulded to your own anatomy, a custom aid is tailored and bespoke in the truest sense: no two shells are the same. The custom family comes in four styles, all custom in the ear hearing aids, which differ only in how large they are and how deep they sit, from the ITE that fills the outer ear bowl to the IIC that hides deep in the canal. We summarise all four below.
How custom hearing aids are made
Every custom hearing aid starts with a picture of your ear. To take an ear impression, your audiologist places a small soft block, called an otoblock, gently into the canal to protect it, then fills the ear with a soft silicone putty that sets in a couple of minutes and is lifted out as an exact mould of your ear. Increasingly this step is done with a 3D ear scanner instead, capturing the same detail digitally with no putty at all.
That impression or digital scan is sent to the manufacturer's lab, where a custom shell is 3D-printed to match it exactly and the electronics, the microphone, receiver and battery, are fitted inside behind the faceplate. The finished aid comes back to the clinic, where it is fitted and fine-tuned with real-ear measurement, verifying the actual sound reaching your eardrum against your prescription. If the fit ever needs adjusting, the shell can be remade from a fresh impression.
The four custom styles
The custom family runs from largest to smallest, and the rule is simple: the larger the style, the more features and battery it holds and the easier it is to handle, while the smaller it is, the more discreet it becomes. Here are the four types of custom hearing aids, each summarised, with a link to its full guide.
The largest custom style, filling the bowl of the outer ear. It is the easiest to handle and has the most room for features and battery, and it suits mild to severe hearing loss.
Read more → ITC In-the-canalThe mid-size style, striking a balance of discretion and features. It is often the smallest custom aid that can still fit Bluetooth or a rechargeable battery, and it suits mild to moderate loss.
Read more → CIC Completely-in-canalA small, nearly invisible style that sits deep in the canal. Its size means fewer features than the larger styles, and it suits mild to moderate loss, with power models reaching severe.
Read more → IIC Invisible-in-canalThe smallest and deepest style, truly invisible past the second bend of the canal. It is the most discreet of all, the canal must suit it, and it suits mild to severe loss.
Read more →Benefits and drawbacks of custom hearing aids
Because all four custom styles share the same basic design, a device that sits entirely in the ear, they share the same broad pros and cons. These are the category-wide points; each style's own detail lives on its page.
Benefits
- An exact custom fit for secure retention and comfort
- A one-piece device that is easy to handle and insert, good for reduced dexterity or vision
- Nothing behind the ear, so they sit well with glasses, masks and hats
- Natural sound that uses your ear's own shape to collect it
- Can be made hypoallergenic for sensitive skin
Drawbacks
- More exposed to wax and moisture, so more cleaning and occasional repairs
- Generally not suited to profound loss, where a behind-the-ear aid is better
- The smaller styles limit features and battery life
- They need an ear canal of suitable size and health
- Being custom-built, a remake takes a little time
Custom versus behind-the-ear hearing aids
The simplest way to place the custom family is against the behind-the-ear styles. With a custom aid the whole device sits inside the ear. With a BTE or a RIC, the body sits behind the ear and only a thin tube, wire or earmould goes into it. Behind-the-ear styles offer more power for greater losses and the longest battery life, while custom styles offer discretion and a fit tailored to your ear.
One common point of confusion is worth clearing up. A custom earmould is not a custom hearing aid. It is an add-on, a moulded tip that attaches to a BTE or RIC to seat it more securely and comfortably, but the hearing aid itself is still a behind-the-ear device. A fully custom aid, by contrast, is one where the entire device is built into a shell that sits in the ear.
Who custom hearing aids suit
Custom hearing aids suit people who want a discreet, in-ear fit with no part behind the ear, which makes them a popular choice for glasses and mask wearers and for anyone who finds a behind-the-ear aid fiddly. Depending on the style, they cover mild through to severe hearing loss, and because the fit is moulded to you they are comfortable to wear all day. The one requirement shared across the family is a suitable ear canal, which the assessment checks.
A word on recharging, since it is a common question. Custom rechargeable hearing aids do exist, but availability depends on the style. The larger custom styles, ITE and many ITC models, now offer a rechargeable battery, while the smallest CIC and IIC usually cannot fit one because of their size. So if recharging is a priority, a larger custom style is the reliable route.
Custom hearing aids: frequently asked questions
Are hearing aids custom made?
Many are. Custom hearing aids are built from an impression or a 3D scan of your ear, so the whole device is shaped to fit you and sits inside your ear. Not every hearing aid is custom, behind-the-ear and receiver-in-canal styles are ready-fit with a standard body, but all four in-the-ear styles, ITE, ITC, CIC and IIC, are custom-made.
How are custom hearing aids made?
Your audiologist takes an impression of your ear, placing a small soft block in the canal and filling it with silicone putty, or capturing your ear with a 3D scanner. That impression or scan is sent to the manufacturer, where a custom shell is 3D-printed and the electronics fitted inside. The finished aid is then fitted and fine-tuned with real-ear measurement so it performs correctly in your ear.
Can custom hearing aids be rechargeable?
Some can, and it depends on the style. The larger custom styles, ITE and many ITC models, now offer a rechargeable battery. The smallest styles, CIC and IIC, usually cannot fit one because of their tiny size, so they typically use a small disposable battery. If recharging matters to you, a larger custom style is the reliable route.
Are custom hearing aids better than behind-the-ear?
Neither is universally better; it depends on your hearing loss and lifestyle. Custom in-ear aids are discreet, sit neatly with glasses and masks, and use the ear's own shape for natural sound. Behind-the-ear aids offer more power for severe and profound loss and the longest battery life. The right choice comes from your audiogram and your priorities, which an assessment establishes.
How long do custom hearing aids last?
With good care, most custom hearing aids last around four to five years. Because they sit in the ear all day they are more exposed to wax and moisture, so regular wax guard changes and cleaning make a real difference, alongside routine servicing at the clinic.
Can anyone have custom hearing aids?
Most people can wear some form of custom aid, but not every style suits every ear. Custom styles need an ear canal of suitable size and health, and the smallest and deepest styles are the most restrictive. Custom hearing aids are also not a good choice for someone who suffers from recurrent outer ear infections, in whom they are often contraindicated. An assessment confirms which style, if any, fits your ear.
Custom hearing aids by brand
Every major manufacturer makes a custom line, and the model names are a useful starting point when you explore each brand. Phonak build the Virto Infinio, Oticon the Own, Signia the Insio IX, Starkey the Picasso and Signature, Widex the Moment Custom, Unitron the Insera, and Rexton the Reach Custom. Each brand page covers its full custom range and technology in detail.
Custom hearing aids and the bigger picture
Whichever custom style you choose, a well-fitted device is excellent at one thing: getting clear sound into your ear with a perfect fit. That is stage one, detection. But your brain still has to relearn how to decode that sound through a damaged cochlea, which is stage two, and that second stage is the focus of our Brain-Based Hearing Programme.
Find the right custom style for your ear
Because the right custom style depends on your ear canal and your hearing loss, the first step is a proper assessment. Book a Brain-Based Hearing Assessment at either of our two London clinics, with full real-ear measurement and honest, brand-independent advice.
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