Audiologist's Review of Oticon Zeal Hearing Aids

I'll be honest with you: when Oticon first told me about the Zeal hearing aid, my immediate reaction was skepticism. A fully in-the-ear hearing aid that is rechargeable, has wireless connectivity, performs like a Receiver-in-Canal (RIC) device, and fits with either a rubber dome or custom ear mold? I've heard bold claims before. 

So when they flew me out to their headquarters in Denmark to experience it firsthand, I went in with my guard up.

I came back completely sold.

What Makes the Oticon Zeal Different?

Receiver-in-Canal hearing aids have dominated the market for good reason. They offer the best combination of features, comfort, and performance across nearly every type and severity of hearing loss. For over a decade, no other style has come close to matching them — until now.

The Oticon Zeal is what Oticon calls their new NXT In-the-Ear category. Nothing goes behind the ear. The entire device sits inside your ear canal, yet it delivers performance that rivals a traditional RIC device. That's not something I expected to be able to say.

At its core, the Zeal runs on Oticon's Sirius chip, the same chip inside the Oticon Intent RIC hearing aids. That means it uses Oticon's second-generation Deep Neural Network (DNN) for AI-powered sound processing, the same always-on technology that has made the Intent one of the most popular hearing aids over the past two years. So right out of the gate, the processing power behind this device is well-proven.

Design and Build Quality

The build quality of the Zeal is immediately impressive. These are not cheap OTC devices. In fact, they feel more refined than many custom prescription hearing aids I've handled over the years.

The Zeal uses what Oticon calls an encapsulation manufacturing process. Rather than building an outer shell and then cramming components inside it, Oticon first arranges all the internal components in their optimal positions and then forms the outer shell around them. The result is an extremely compact device with an IP68 rating, the highest available for moisture and debris resistance in hearing aids.

One design element worth pointing out is the antenna on the back of the device. That single piece serves three functions — it's the wireless antenna, the removal string, and the retention filament. It's the only replaceable component on the Zeal, which makes sense given how the device is constructed. The more contact this antenna makes with your ear, the better the wireless transmission. In practice, I found it to work remarkably well.

Color options are straightforward: the Zeal is available in black. If discreetness is the goal, black is the right call for sitting inside an ear canal.

Fitting Options and Candidacy

The Zeal is designed for hearing losses with thresholds up to 75 decibels, and it can be fit the same day using rubber domes, just like an RIC device. For those who need more amplification or have specific ear canal acoustics, Oticon offers silicone or acrylic Micro Mold custom ear tips.

In my testing, I fit both my wife Ashley and myself with the Zeal using Real Ear Measurement, which I want to explain here because it matters a great deal with this particular device.

For Ashley, who has a high-frequency hearing loss ranging from moderate in the right ear to severe in the left, I was able to hit prescriptive targets using 8mm vented rubber domes without triggering feedback, which genuinely surprised me. For someone at the upper limit of the Zeal's candidacy range in my larger ear canals, I needed a custom ear tip on one side and still came close to targets, though feedback management became more of a factor.

The takeaway here is that candidacy for the Zeal is not something you can predict from an audiogram alone. Ear canal size and shape, the type of tip used, and the degree and configuration of your hearing loss all play into whether this hearing aid will work well for you. This is exactly why Real Ear Measurement is non-negotiable with the Zeal, or any hearing aid for that matter. Without it, there is simply no reliable way to know whether you're actually receiving the amplification your hearing loss requires.

The manufacturer's first-fit settings in my testing were significantly off target in the high frequencies, which are the most important for speech clarity. After custom programming guided by Real Ear Measurement, the results were dramatically better. That gap between first-fit and a properly verified fit is the difference between a hearing aid that helps and one that doesn't.

Connectivity

The Zeal supports Bluetooth LE Audio for Android devices and standard Bluetooth Low Energy for Apple devices. For Android users, Google Fast Pair makes setup quick and straightforward. The Oticon Companion app (the same app used with the Intent) works with the Zeal for volume adjustments, program changes, and more.

The standout connectivity feature, though, is Auracast. This is a broadcast audio technology made possible by Bluetooth LE Audio that allows you to receive audio directly from a compatible public venue — a sports bar, a theater, a place of worship — streamed straight into your hearing aids. I tested this during my time in Denmark and the range was remarkable. I was nearly in another building and still receiving a clean signal, something a telecoil simply cannot match.

For iPhone users who don't yet have LE Audio built into their devices, Oticon built an Auracast activation feature directly into the Companion app. It also handles down-sampling to bridge compatibility gaps with certain broadcast frequencies. It's a thoughtful solution to a real-world problem.

Battery Life and Charging

The Zeal uses lithium-ion batteries with contact charging. A full two-hour charge delivers up to 20 hours of use, including four hours of streaming. The case holds three additional full charges, so you can top up on the go without needing a wall outlet.

One thing to keep in mind: there is no way to turn these hearing aids off without placing them in the charger. If you're frequently away from home, having a second charger on hand is worth considering.

The contact charging also means that keeping the gold battery contacts clean is important. Earwax buildup on those contacts will interfere with charging over time, so regular maintenance — including wiping the contacts with an alcohol wipe — should be part of your routine.

Real-World Performance

After wearing the Zeal for more than a week, my overall performance was very close to what I get from the Oticon Intent RIC. Speech clarity, background noise management, and the AI sound processing all held up well across different listening environments. These hearing aids even have motion sensors built in, allowing you to double-tap your ear to answer a phone call. In a device this small, that still impresses me.

The main limitation compared to a traditional RIC is feedback. The Zeal's in-the-ear design means there is inherently more risk of feedback, particularly for those with larger ear canals or higher-frequency hearing losses that require more high-frequency amplification. It's manageable with proper fitting, but it's something to be aware of going in.

Who Should Consider the Oticon Zeal?

If you've been hesitant to try hearing aids because of how they look, or if you've worn RIC devices and wished for something more discreet without giving up features, the Zeal deserves serious consideration. It hits the four things most hearing aid users care about — rechargeability, discreetness, wireless connectivity, and performance — in a package that goes entirely inside the ear canal.

It is not for everyone. Those with hearing losses beyond 75 decibels, or with ear canals that don't accommodate the device well, may find that an RIC like the Oticon Intent is still the better fit. But for the right candidate, the Zeal is genuinely impressive.

Find a HearingUp Provider to Experience the Oticon Zeal

No matter how good the technology is, a hearing aid only performs as well as the professional who fits and programs it. The Oticon Zeal makes this especially clear: without Real Ear Measurement and careful custom programming, you won't get close to what this device is capable of.

If you're interested in the Oticon Zeal, I strongly encourage you to find a provider through the HearingUp network at HearingUp.com. Every provider in our network has been personally vetted by me and is committed to following comprehensive audiologic best practices, including Real Ear Measurement on every fitting. These are some of the most sought-after hearing care professionals in the country, and they will make sure that whatever hearing aid you choose, including the Zeal, is working the way it should for your specific hearing loss.