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frequency response[′frē·kwən·sē ri‚späns]
A measure of the effectiveness with which a circuit, device, or system transmits the different frequencies applied to it; it is a phasor whose magnitude is the ratio of the magnitude of the output signal to that of a sine-wave input, and whose phase is that of the output with respect to the input. Also known as amplitude-frequency response; sine-wave response.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
frequency responseIn an audio system, the accuracy of sound reproduction. A totally flat response means that there is no increase or decrease in volume level across the frequency range. Measured in decibels (dB), this would be plus or minus 0 dB from 20Hz to 20,000Hz. A high-end audio system can deviate by +/- 0.5 dB, but a CD-ROM drive should not be off by more than +/- 3 dB.
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