| Part of speech | unknown part of speech |
|---|
| Nominative | akustiko |
|---|---|
| Accusative | akustikon |
| Afrikaans | akoestiek |
|---|---|
| Catalan | acústica |
| Czech | akustika |
| Dutch | akoestiek; geluidsleer |
| English | acoustics |
| French | acoustique |
| German | Akustik; Klankwirkung; Klangbeschaffenheit |
| Greek | ακουστική |
| Hungarian | akusztika |
| Icelandic | hljóðeðlisfræði |
| Portuguese | acústica |
| Saterland Frisian | Akustik |
| Spanish | acústica |
| Turkish | akustik; ses düzeni |
| Welsh | clyboded |
| West Frisian | akoestyk |