Hi HN, we're Aarush and Arnav from The Subvocal Company (YC F26). We’re building smart glasses that let you talk to your computer without talking out loud. You can mouth words silently and discreetly and the glasses decode them to text at the speed of speech.Here's a video of Dave from YC trying it out: https://youtube.com/shorts/-L1Qb5oINK4Arnav and I were studying CS at Georgia Tech at the beginning of the year, with no experience in silent speech or sensing. We were both AI-native builders and power users of Wispr Flow. What bugged us was not being able to use these tools in the library (or an office) or in public. At Stanford’s TreeHacks in February, we decided to build the most technically ridiculous thing we could think of. We’d read about AlterEgo, a silent speech system out of MIT’s Media Lab, and wanted to recreate it in 36 hours. We built a crude prototype, sticking EMG electrodes onto my face:https://drive.google.com/file/d/1mwhv5HZMz3UTevdrgwS5O7g2jWV...We got it to kind of work at a letter level in a very janky way. It wasn’t good enough to win the hackathon, but convinced us to go all in. The first time I typed a sentence without anyone noticing, I felt the magic of the technology.We raised our pre-seed from Afore Capital and went all-in! We quickly realized EMG (reading muscle electrical signals) wouldn’t work:- Signal changes due to sweat- Electrical interference- Placement variability- Most importantly, no one wants to stick electrodes onto their face!!So we pivoted to RF and built the glasses you see now. They emit radio waves, similar to Bluetooth, that pass through your face. As they cross the tongue, lips and soft palate, they’re modulated by silent mouthing. We train foundation models on this data to decode these perturbations to text.Despite prior academic research, getting this to work was a huge engineering challenge. First we built an extremely low noise RF sensing stack. Then we had to place antennas so their fields overlapped maximally with the articulators. Our first attempt on glasses failed completely, so we reverted to old habits and taped antennas on our face:https://drive.google.com/file/d/1ks0dS0eZiTV9EqSFsyB_w5BBjpc...Since taping antennas consistently in the same spot and angle was hard, we created this weird but effective head rig to hold them in place:https://drive.google.com/file/d/1rhzNFpdDzr7oHk0isFY70dkoV4C...This worked, but obviously wasn’t a product yet. So we worked deep in simulations to design glasses that could hold the antennas.That evolved into our