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In signal processing, a filter is a device or process that removes some unwanted components or features from a signal. Filtering is a class of signal processing...

A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors. It may be driven by...

pleated paper, or spun fiberglass filter elements. Another method, air ionizers, use fibers or elements with a static electric charge, which attract dust particles...

filter depends on the filter design. The filter is sometimes called a high-cut filter, or treble-cut filter in audio applications. A low-pass filter is...

For statistics and control theory, Kalman filtering, also known as linear quadratic estimation, is an algorithm that uses a series of measurements observed...

signals problem, an electric filter is used. The frequency of each RF signal is usually different from other RF signals. An electronic filter can select only...

Analogue filters are a basic building block of signal processing much used in electronics. Amongst their many applications are the separation of an audio...

A band-pass filter or bandpass filter (BPF) is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that...

residential area, with the notable exception of decommissioned filter beds — the Seething Wells Filter Beds — in the northwest part of the area that borders the...

A diesel particulate filter (DPF) is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine. Wall-flow diesel...

MPX filter is a function found in analogue stereo FM broadcasting and personal monitor equipment, FM tuners and cassette decks. An MPX filter is, at least...

A waveguide filter is an electronic filter constructed with waveguide technology. Waveguides are hollow metal conduits inside which an electromagnetic...

An oil filter is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Their chief use is in internal-combustion...

A fuel filter is a filter used to screen out foreign particles or liquids from the fuel. Most internal combustion engines use a fuel filter, in order to...

A mechanical filter is a signal processing filter usually used in place of an electronic filter at radio frequencies. Its purpose is the same as that of...

optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations. It can filter a beam of...

Electronic filter topology defines electronic filter circuits without taking note of the values of the components used but only the manner in which those...

Filter feeders are aquatic animals that acquire nutrients by feeding on organic matters, food particles or smaller organisms (bacteria, microalgae and...

resonance frequency, caused by shock pulses. The second frame shows the electric filter which passes a train of transients at 32 kHz. Their amplitudes depend...

particulate air) filter, also known as high-efficiency particulate absorbing filter[citation needed] and high-efficiency particulate arrestance filter, is an efficiency...