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# Radar Glasses Translate Silent Speech Into Text at 200 Words Per Minute
- URL: https://adjacent.media/signals/radar-glasses-translate-silent-speech-into-text-at-200-words-per-minute/
- Published: 2026-11-07T11:15:20.000Z
- Updated: 2026-11-07T11:15:20.000Z
- Description: Subvocal’s millimeter-wave radar detects mouth and throat movements without microphones, enabling hands-free text input in loud environments or for users where speech recognition is inaccessible.
- Author: Jonathan Greene
- Tags: #signal, theme-connected, wearable, spatial computing, hardware innovation

Source: [Kottke](https://kottke.org/26/11/0049933-subvocals-glasses?ref=adjacent.media)

Subvocal's millimeter-wave radar detects mouth and throat movements without microphones, enabling hands-free text input in loud environments or for users where speech recognition is inaccessible. At 200 wpm, it approaches natural speaking speed—a threshold that matters for adoption beyond proof-of-concept. The real constraint is whether the radar stays accurate across different faces, accents, and indoor interference, not whether the core technology works. This reflects a broader bet among interface startups on sensor miniaturization and edge processing: embedding intelligence in the device itself rather than relying on cloud transcription or connectivity.