Strained, having impurities removed
1. Papier, étoffe, linge, pierre, sable, charbon, éponge, etc., au travers de quoi on passe un liquide ou un gaz qu'on veut purifier.
2. Dispositif électronique destiné ŕ réduire les bruits parasites dans des signaux radioélectriques.
3. Logiciel, ou élément d'un logiciel, qui filtre ou trie certaines données.
ETYM French filtre, the same word as feutre felt, Late Lat. filtrum, feltrum, felt, fulled wool, this being used for straining liquors. Related to Feuter.
(Homonym: philter, philtre).
1. Alters the frequency spectrum of signals passing through it.
2. Removes something from whatever passes through it.
In electronics, a circuit that transmits a signal of some frequencies better than others. A low-pass filter transmits signals of low frequency and direct current; a high-pass filter transmits high-frequency signals; a band-pass filter transmits signals in a band of frequencies.An electrical circuit that passes frequencies within a specified frequency band and attenuates signals that fall outside of that frequency band.