1) Linear filter 
=== Algorithmic implementation === The filter recurrence relation provides a way to determine the output samples in terms of the input samples and the preceding output. The following pseudocode algorithm will simulate the effect of a high-pass filter on a series of digital samples: ==Applications== ===Audio=== An alternative, which provides good q...
(from the article `sound`) ...by the size and shape of the variation. A region of either larger or smaller area will function as a low-pass filter, reflecting high frequencies; ...
filter having a single pass-band extending from a specified cut-off frequency upwardsa filter having a single pass band above a cut-off frequency and a stop band for lower frequencies
A device that rejects signals that are below a certain frequency (called the cut-off frequency) and passes signals with frequencies that are higher.
A device or material that allows high frequency signals to pass while attenuating other signals. ... (05 Mar 2000) ... 
An electronic filter used in various audio circuits to attenuate all frequencies below a chosen frequency.
Type: Term Definitions: 1. a device or material that allows high frequency signals to pass while attenuating other signals.
This is a type of filter that rejects low frequency audio signals.
utilizes capacitors, as the impedance of a capacitor decreases for HIGH frequencies, this enables it to ensure the passage of higher frequencies, and stop the passage of more powerful, lower frequency signals which may blow the poor little tweeter unit to smithereens!
noun a filter that passes frequencies above a certain value and attenuates frequencies below that value
An electronic filter of a type commonly incorporated in Crossover circuits that permits the passage