 |
| |||
| 低于声频的 | |||
| 亚音频的; 亚声波的 | |||
| 次声频的 | |||
| 亚声频的 | |||
| 亚声的; 次声的 | |||
| 亚音速的; 亚声速的; 次声波的 | |||
|
infrasonic : 18 phrases in 9 subjects |
| Electronics | 1 |
| Geophysics | 1 |
| Information technology | 3 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 6 |
| Technology | 2 |
| Telecommunications | 1 |
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