The maximum signal bandwidth handled by an electronic device, which is a measure of the quality of reproduction of various or extreme frequencies within the band. If the frequency response of a video processor, for example, is adequate, there is no discernable deterioration in picture quality at the edges of the spectrum and no fine details or color are lost. In Hi-Fi audio reproduction, frequency response should extend up to 20,000 Hz, the practical limit of human hearing. The frequency response plot not only measures the extreme edges of the frequencies handled but also linearity and fidelity throughout the whole spectrum.
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