The First Wearable for Your Brain

PEER REVIEWED SPONSORED CONTENT

Biohack Yourself JUL 2026

Wearable technology has transformed how people understand their bodies. Smartwatches track heart rate. Fitness trackers count steps. Smart rings monitor recovery. Yet the body's most important organ has largely been left out of the wearable revolution: the brain.

That is beginning to change.

NextSense Smartbuds introduce a new category of wearable technology designed specifically for the brain. Combining electroencephalography (EEG) with real-time closed-loop audio, Smartbuds are designed to help guide your brain into the state you want, whether that's deep, restorative sleep at night, sharper focus during the day, calmer meditation, or a refreshing power nap.

Unlike traditional wearables that simply collect data and summarize it later, Smartbuds continuously monitor brain activity and respond in real time. Instead of telling you what happened after the experience is over, they adapt while it's happening, creating a personalized experience based on your brain's own activity.

Just as importantly, Smartbuds also function as everyday wireless earbuds for listening to music, podcasts, and phone calls. The difference is that they're also equipped with advanced brain-sensing technology, bringing EEG into something people already wear every day.

For biohackers, that represents something entirely new. Rather than another sleep tracker, Smartbuds offer a wearable designed to help optimize the brain itself.

From Measuring Sleep to Supporting the Brain

Sleep has become one of the most measured aspects of modern health.

People have upgraded their mattresses, optimized bedroom temperatures, invested in blackout curtains, limited caffeine, and filled their wrists and fingers with wearable devices that estimate recovery and sleep quality. Millions of people now wake up every morning with detailed reports showing how long they slept, how much REM sleep they achieved, and whether their readiness scores improved.

Yet despite having more information than ever before, many still wake up feeling exhausted. Part of the reason is that most consumer sleep technology is designed to observe rather than respond.

Smartwatches, rings, and fitness trackers estimate sleep stages using indirect signals such as movement, heart rate variability, breathing patterns, and body temperature. These insights can be incredibly useful, but they remain estimates rather than direct measurements of what the brain is actually doing.

Sleep doesn't happen in the wrist or on the finger. It happens in the brain.

For decades, researchers have relied on electroencephalography, more commonly known as EEG, to directly measure the brain's electrical activity. EEG has long been considered the gold standard for identifying sleep stages because it measures the organ responsible for sleep itself rather than inferring sleep through secondary physiological signals.

Until recently, however, EEG largely remained inside sleep laboratories.

Closing the Gap Between the Lab and Everyday Life

Anyone who has undergone a sleep study knows the experience is far from natural.

Patients spend the night connected to multiple sensors while technicians monitor their brain activity throughout the evening. The information can be incredibly valuable, but the process is expensive, inconvenient, and limited to a single clinical environment.

Most people are not going to spend repeated nights in a sleep lab simply to understand or improve how they sleep.

That has created a long-standing gap between the precision of clinical sleep science and the practicality of consumer wellness technology.

NextSense was built to help close that gap.

Smartbuds incorporate six dry-contact EEG sensors capable of measuring brain activity in real time without wires, conductive gels, or complicated setup procedures. Users simply wear them like a comfortable pair of earbuds designed for overnight use.

Weighing only five grams each, Smartbuds are engineered for all-night comfort, including for side sleepers who often struggle with bulkier wearable devices.

The goal is not simply to make EEG more accessible. It is to bring brain-responsive technology into everyday life.

Why Closed-Loop Technology Changes the Conversation

Many health devices are excellent at measurement. They collect information, generate charts, and help users understand what already happened.

NextSense takes a different approach.

Its closed-loop system continuously monitors brain activity through EEG and adjusts audio in real time based on the user's current brain state. Instead of delivering identical audio to everyone, the listening experience evolves alongside the brain itself.

That distinction may seem subtle, but it fundamentally changes how the technology is used.

Rather than waiting until the next morning to report sleep quality, Smartbuds are designed to respond while sleep is taking place. Rather than offering a fixed meditation session or focus soundtrack, they continuously adapt as the brain changes throughout the experience.

This shift from passive tracking to active response represents one of the biggest changes happening across wearable technology today.

Why Deep Sleep Still Matters

Although Smartbuds support multiple brain states, sleep remains one of their most compelling applications.

Many conversations about sleep focus on duration.

People often ask whether they are getting seven, eight, or nine hours each night. Yet sleep researchers have long understood that quality is just as important as quantity.

One of the most restorative stages is slow-wave sleep, commonly referred to as deep sleep.

During this phase, the brain produces slow delta waves associated with physical recovery, memory consolidation, and overall resilience. Deep sleep plays an important role in helping the body and brain recover from the demands of daily life.

The challenge is that deep sleep cannot simply be forced.

It emerges through complex neurological processes influenced by circadian rhythms, stress levels, environmental factors, and the nervous system.

Using real-time EEG, Smartbuds identify naturally occurring slow-wave sleep and deliver carefully timed audio pulses designed to reinforce those restorative brain rhythms without waking the user. This process, known as slow-wave enhancement, is designed to work alongside the brain's natural activity rather than interrupt it.

Instead of simply observing sleep, the system is designed to actively support it while it is happening.

Beyond Better Sleep

One of the reasons Smartbuds stand apart is that the same technology extends well beyond nighttime use.

Focus has become increasingly difficult to maintain in a world filled with constant notifications, multitasking, and digital distractions. Many productivity tools rely on timers, playlists, or generic soundscapes that remain the same regardless of how a person is actually feeling.

Smartbuds take a more personalized approach.

During focus sessions, the EEG sensors continuously monitor changes in brain activity while the closed-loop system adapts audio in real time to help support sustained attention. Instead of delivering a one-size-fits-all experience, each session responds to the user's current cognitive state.

Meditation follows a similar philosophy.

Rather than playing the same guided session every time, Smartbuds monitor how the brain responds as users settle into calmer states and adjust the listening experience accordingly. The result is a meditation experience that evolves alongside the individual instead of remaining static from beginning to end.

The same technology can also be used during guided naps, helping users make the most of shorter periods of rest without requiring a full night's sleep.

Together, sleep, focus, meditation, and naps position Smartbuds as more than a sleep device. They become a wearable designed to support the brain throughout the day.

A New Category of Wearable Technology

Most wearables have focused on the body.

They track heart rate, movement, glucose, recovery, and countless other physiological signals. Yet the organ responsible for sleep, focus, learning, stress, and cognition has remained surprisingly difficult to understand outside of research settings.

Advances in wearable EEG are helping bring brain sensing out of the laboratory and into everyday life.

As EEG technology becomes smaller, more comfortable, and easier to integrate into everyday life, devices like NextSense suggest a future where understanding and responding to brain activity may become just as routine as tracking heart rate or counting steps.

For biohackers, that future is particularly exciting.

Rather than simply measuring health, the next generation of wearables may actively help guide the brain toward better sleep, sharper focus, calmer meditation, and improved daily performance.

Learn more about NextSense Smartbuds and discover how brain-responsive technology can support better sleep, sharper focus, and calmer meditation at nextsense.io.

NextSense is a featured brand in the Biohack Yourself Magazine Summer 2026 issue with Bryan Johnson on the cover, available in stores and online on July 27, 2026.

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