| Subject | English | Latvian |
| environ. | noise control The process to control the audible sound to an acceptable level | trokšņa kontrole |
| environ. | traffic noise control Traffic noise can be controlled by reduction at source, by fitting motor vehicles with silencers, by installing barriers which interrupt the direct path of sound or by insulating dwellings exposed to high noise levels, such as those related to motorways or airports | satiksmes trokšņa kontrole |