 |
| |||
| audio frequence; frequency of a sound | |||
| audiofrequency | |||
| audio frequency | |||
| voice-frequency tone | |||
| voice frequency; speech frequency | |||
| fréquence acoustique: 20 phrases in 5 subjects |
| Communications | 7 |
| Earth sciences | 7 |
| Electronics | 3 |
| Information technology | 2 |
| Medical appliances | 1 |