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| noise reduction | |||
| soundproofing Reducing or eliminating reverberation in a room by placing sound-absorbing materials on the walls and ceiling; sound insulation | |||
| ääneneristys: 3 a las frases, 3 temas |
| Ambiente | 1 |
| Ciencias de la tierra | 1 |
| Cuidado de la salud | 1 |