What Is SNC? Our Wrist-Optimized EMG, Explained
If you've read about Mudra, you've probably seen the term SNC — Surface Nerve Conductance. Here's the plain-English version of what it is, because the honest explanation is also the most convincing one.
SNC is our brand name for our wrist-optimized surface EMG (sEMG). EMG — electromyography — reads the small electrical signals your muscles produce when your nerves activate them. It's a well-understood class of bio-signal. What's hard isn't the category; it's reading it well at the wrist, where the muscles are small, the nerve bundles sit close to the surface, and the signal is faint and easily disrupted by movement, sweat, and the simple fact that everyone's body is different.
That's the problem we've spent a decade solving. Getting reliable, low-false-positive gesture recognition from a wrist-worn EMG sensor — across thousands of different people, without per-user calibration headaches — is a genuine engineering achievement. "SNC" is the name we give our particular way of doing it: the electrode arrangement, the on-device signal processing, and the models that turn a noisy wrist signal into a clean command.
So when you see "SNC," read it as: our wrist-optimized EMG. It's not a different or earlier signal than EMG, and it isn't magic — it's EMG done unusually well for the hardest place to wear it.
Why does it work where cameras don't? Because it reads the signal at its source — at your wrist — rather than watching your hands from the outside. That means it keeps working in the dark, with your hand behind your back, and through gloves. It also captures how hard you press, not just whether you moved, which opens up analog control a camera can't see.
On our higher tiers we fuse EMG with two more signals: an IMU for wrist motion and orientation, and PPG for physiological context like engagement. No single sensor is sufficient on its own; fusing them is what makes the system robust across real-world conditions.
If you want the deeper science, our whitepapers walk through the sensor fusion, the accuracy and reach targets, and the trade-offs of building a wearable neural interface. But the short version is simple: SNC is EMG, read at the wrist, exceptionally well — and that mastery is the foundation everything else is built on.