 |
15 kHz | audio frequency
| audio frequency | |
| commun. tech. | audiofrekvens; tonfrekvens |
| 15: 18 phrases in 8 subjects |
| Communications | 2 |
| General | 6 |
| Immigration and citizenship | 2 |
| Information technology | 1 |
| Metallurgy | 1 |
| Pharmacy and pharmacology | 1 |
| Procedural law | 2 |
| Statistics | 3 |