voice-frequency
| key sending
| Voice Frequency | |
| nat.sc. | fréquence vocale |
| voice frequency | |
| commun. | fréquence téléphonique; fréquence vocale |
| law el. | bande vocale |
| telecom. | fréquence acoustique |
| key sending | |
| commun. | envoi des signaux au clavier |
|
voice-frequency : 63 phrases in 10 subjects |
| Aviation | 1 |
| Communications | 27 |
| Electronics | 12 |
| General | 1 |
| Information technology | 14 |
| Medical appliances | 1 |
| Power lines | 2 |
| Telecommunications | 3 |
| Telegraphy | 1 |
| Telephony | 1 |