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Recently cleared by the FDA, NAOX LINK and the upcoming NAOX WAVE, aren't just sleep trackers. They are a prescription medical device that fit in your ear like a standard earbud but packs the power of a professional EEG (electroencephalogram)
Traditional EEGs are the gold standard for diagnosing conditions like epilepsy or sleep disorders, but they have a major flaw: they are inconvenient. To get a high-quality recording, a technician usually has to apply 20+ electrodes to your scalp using a conductive gel. It’s messy, time-consuming, and most importantly it only captures a snapshot of your brain activity.
For many patients, symptoms like nocturnal seizures or rare sleep disturbances don't happen on command during a 30-minute hospital visit. This leads to missing data, delayed diagnoses, and long waiting lists for specialized Sleep Labs or Epilepsy Monitoring Units (EMUs).
How it works
The ear canal is actually a hidden gem for brain sensing. Because the skin inside the ear is thin and the canal is physically close to the temporal lobe of the brain, we can pick up electrical signals (microvolts) that are remarkably clean.
The NAOX platform utilizes a single-channel EEG derived from non-invasive electrodes integrated into the ear-tips. While a full scalp EEG gives you a panoramic view of the brain, the NAOX sensors provide a high-quality temporal derivation.
In clinical validation studies (Pazuelo et al., 2024), the signals recorded from the ear were compared directly against the gold-standard scalp electrodes. The device successfully identified:
Alpha Rhythms: The 8–13 Hz waves that appear when you close your eyes and relax.
Sleep Architecture: It can distinguish between light sleep (N1), deep sleep (N3), and REM by tracking spindles and slow-wave activity.
Epileptic Events: In real-world testing, the device successfully detected epileptic seizures in patients outside of a clinical setting.
Two Paths to Discovery: LINK vs. WAVE
Two Paths to Discovery: LINK vs. WAVE
While both devices share the same core in-ear EEG technology, they serve two very different but equally important purposes.
1. NAOX LINK: The Clinical Workhorse
The LINK is the prescription-grade medical device. Its job is purely diagnostic. It’s designed to be handed to a patient by a physician for long-term monitoring at home.
Side-Sleeper Friendly: Designed to stay in place comfortably all night.
Pediatric Access: Cleared for patients as young as 6 years old.
Data Transmission: Securely transmits raw EEG data to a platform for neurologist review.
2. NAOX WAVE: The Research & Innovation Hub
The WAVE is where things get even more interesting for the tech enthusiasts among us. It is an Ear-EEG-as-a-Service platform designed for researchers and developers.
Real-time Access: Unlike the LINK, which focuses on clinical recording, the WAVE allows for real-time brainwave data streaming.
API Integration: It’s built for those looking to create new applications, from neurofeedback tools to advanced BCI (Brain-Computer Interface) experiments.
The Sandboxed Brain: It gives the scientific community a playground to discover new biomarkers without needing a full hospital lab.
This shift toward invisible monitoring is about more than just convenience; it’s about changing the patient experience. As Hugo de Oliveira, CEO and co-founder of NAOX Technologies, has noted, the goal is to provide a concrete solution for patients that provides new opportunities for studying brain activity without the burden of traditional machinery. He has emphasized that this project marks a turning point in the history of EEG by making brain monitoring a seamless part of a patient's life.
The NAOX platform doesn't replace a full 256-channel research EEG, and it doesn't provide automated diagnoses. The data must still be interpreted by a professional. However, it solves the most critical part of the puzzle: data acquisition.
By making the tool invisible and easy to use, we move away from a healthcare system that waits for you to get sick enough to go to a hospital. Instead, we’re entering an era where your brain health can be monitored in the environment where you actually live.
References
Moumane, A., et al. (2024). Comparative study of in-ear EEG vs. gold-standard scalp EEG in sleep and wakefulness. [Scientific Publication referenced by NAOX].
NAOX Technologies. (n.d.). NAOX LINK: Long recordings at home, self-applied by patients. Retrieved April 6, 2026, from https://www.naox.tech/en/naox-link
NAOX Technologies. (n.d.). NAOX WAVE: In-Ear-EEG-as-a-Service. Retrieved April 6, 2026, from https://www.naox.tech/en/naox-wave
Pazuelo, M., et al. (2024). Validation of single-channel in-ear EEG for clinical screening during synchronous dual recordings. [Scientific Publication referenced by NAOX].
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