A graph of the frequency response of a device, i.e., the graph of its output amplitude response vs. the input frequency. See linear. For example, tThe frequency response curve for a microphone is a graph of the mic’s output level in dBindB at various frequencies. The output level at 1kHz is placed on the 0dB line and the levels at other frequencies are placed above or below that reference level. The shape of the response curve suggests how the mic sounds; a wide, flat response tends to sound accurate and natural. A rising high end or a presence peak around 5-10kHz sounds more crisp and articulate. Note that the response curve is measured at a specified distance from the mic, usually 2-3 feet; the curve reflects the performance of the microphone only for that particular distance.