| Subject | English | French |
| tech. | noise-free | sans bruits |
| comp. | noise-free | sans bruit |
| IT | noise-free environment | environnement silencieux |
| automat. | noise-free optimal regulator | régulateur libre de bruit optimal |
| gen. | noise-free picture | image exempte de souffle |
| environ. | noise-free technology Sound is radiated both as air-borne and as structure-borne; most sources produce both, thus various noise attenuation principles must be employed. Measures include: the replacement of components with quieter parts and material; the enclosure of particularly noisy components; the selection of quieter types of fan; the replacement of noisy compressed-air nozzles with quieter types; the choice of quieter transmission and cooling systems | technologie silencieuse |
| environ. | noise-free technology | technologie silencieuse |