![]() A filter in electrical engineering, communications, audio production, and signal processing is a device that removes, filters out, and/or attenuates specific frequencies from a signal. And I’d tell you that filters keep things out of your audio signal.įourier analysis and theory says that a signal (electrical, audio, electromagnetic, etc.) can be decomposed into an infinite number of different sinusoidal waveforms all with different frequencies, amplitudes, and phases. Your computational fluid dynamics guy (you have one of those, right?) would tell you they keep things out of your Navier-Stokes equations. ![]() Your car guy would tell you they keep things out of your engine. ![]() ![]() ![]() Your pool guy would tell you they keep things out of your pool.
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