| English | Basque |
| acoustic filter A device employed to reject sound in a particular range of frequencies while passing sound in another range of frequencies | soinu-iragazki |
| filter cake Accumulated solids, wet or dry, generated by any filtration process, including accumulation on fabric filters in air filtering processes, or accumulation of wet solids in liquid filtering processes | iragazte-produktu |
| image filtering A remote sensing term related to image enhancement that refers to the removal of a spatial component of electromagnetic radiation | irudien iragazpen |
| trickling filter A system of secondary sewage treatment which is similar to self-purification action of streams; it is more accurately a biological oxidizing bed; the effluent is placed on the stones in the bed and microorganisms present consume the solids as a food supply | bioiragazki |
