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| 声频率; 音频率 | |||
| 音频 | |||
| 声响频率; 声频 | |||
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sound frequency : 33 phrases in 13 subjects |
| Animal husbandry | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Nautical | 4 |
| Nursing | 1 |
| Project management | 1 |
| Rail transport | 4 |
| Reproductive biology | 1 |
| Space | 2 |
| Technology | 13 |
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