| Clue | Source | Date |
|---|---|---|
| Spoken form of personal identification | The Atlantic | 26 Sep 2026 |
| Voice identification | ||
| Visual representation of speech | ||
| Active, for one, to make hard copy of recorded speech | ||
| Visual representation of the spoken word | USA Today | 30 Dec 2017 |
| Visual representation of the spoken word | ||
| High-tech ID |