 |
| |||
| audio (Relating to frequencies within the range of perception by the human ear - from about 15 to 20,000 hertz (cycles per second)) | |||
| sonic | |||
| |||
| record (Phonodisc; sound recording on a disc) | |||
| geluids: 25 phrases in 6 subjects |
| Communications | 3 |
| Earth sciences | 1 |
| Electronics | 3 |
| General | 1 |
| Information technology | 1 |
| Patents | 16 |