plural of filter funnel

Of a liquid; to move slowly down to lower substrate levels. / (idiomatic) (by extension) Of information, or resources; to move slowly down to lower levels of an organisation, or population.

A filter of trapezoidal shape specified by four corner frequencies, f1 through f4. The filter rejects below f1 and above f4, is linear from f1 to f2 and from f3 to f4, and is flat from f2 to f3.

(slang) Any device that limits or suppresses the flow of bogons. / (slang, humorous) An imaginary device capable of preventing high-bogosity material from reaching its destination.

simple past tense and past participle of filter down

present participle of filter down

Abbreviation of least mean squares filter.

simple past tense and past participle of filter out

present participle of filter out

(signal processing) An array of band-pass filters that separates the input signal into multiple components, each one carrying a single frequency subband of the original signal.