tl;dr: Two Georgia Tech students (YC F26) built smart glasses that decode silently mouthed (or even closed-mouth) speech into text by emitting RF waves that pass through the face and get modulated by the tongue, lips, and soft palate. After abandoning EMG electrodes due to noise and usability issues, they trained foundation models on paid data collection to handle cross-user anatomical variation, achieving usable performance with just a 20-sentence calibration. Preorders are open for a 500-unit first batch, with shipping targeted for Q1 2027.