Show HN: Subvocal – Talk to your computer without making noise

Subvocal, a startup founded by Aarush and Arnav, is developing smart glasses that allow users to communicate with their computer silently by mouthing words. The glasses use radio frequency (RF) waves to detect the subtle changes in the user's mouth and lips when speaking silently. After previous attempts using electromyography (EMG) electrodes, the team switched to RF sensing and created a custom head rig to hold the antennas in place. They overcame challenges such as signal noise, antenna placement, and cross-user generalization by scaling up their dataset and fine-tuning their models. The company is now accepting preorders for their first batch of 500 units, with a $200 discount off the final price.