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| Subject | English | Portuguese |
| health. | anti-noise barriers | paineis absorventes |
| health. | anti-noise barriers | barreiras sonoras |
| environ. | noise barrier Barriers for reducing the propagation of sound: they are widely used in industry and alongside roads and railways to shield receivers from noise sources. Barriers will not reduce the noise on the receivers side, but will increase it, unless the barrier is also covered in absorbing material | barreiras acústicas |
| environ. | noise barrier | barreira de proteção |
| environ. | noise barrier | barreira de insonorização |
| environ. | noise barrier | barreiras acústicas |
| environ. | noise barrier | barreira protetora |
| environ. | noise barrier | barreira acústica |
| construct. | noise barrier | barreira antirruído |
| transp., environ. | road traffic noise reducing barrier | barreira anti-ruído |