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| noise frequency spectrum | |||
| noise spectrum The range of frequencies occurring in the noise emitted by a source (出现在同一来源发出的噪声的频率范围。) | |||
| noise spectrum | |||
| 噪声频谱: 15 phrases in 9 subjects |
| Acoustics | 1 |
| Air defense | 1 |
| Automobiles | 3 |
| Communications | 1 |
| Electronics | 2 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Technology | 3 |
| Telecommunications | 2 |
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