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| noise reduction The reduction in the sound pressure level of a noise, or the attenuation of unwanted sound by any means; noise reduction | |||
| noise abatement | |||
| riduzione del rumore: 7 phrases in 5 subjects |
| Earth sciences | 1 |
| Electronics | 2 |
| General | 1 |
| Health care | 2 |
| Mechanic engineering | 1 |