 |
| |||
| Sprachfrequenz f; Sprechfrequenz f; Tonfrequenz f | |||
| Hörfrequenz f | |||
| |||
| Fernsprechfrequenz f | |||
| fréquence vocale: 39 phrases in 7 subjects |
| Communications | 13 |
| Electronics | 12 |
| Information technology | 8 |
| Measuring instruments | 1 |
| Medical appliances | 1 |
| Microsoft | 1 |
| Telecommunications | 3 |