Frequency responseFrequency response
is the measure of any system's response to frequency
, but is usually used in connection with electronic
amplifiers and similar systems, particularly in relation to audio
signals. For example, a high fidelity
amplifier may be said to have a frequency response of 20Hz
- 20,000Hz ±1dB
, which tells you that the system responds equally to all frequencies within that range and within the limits quoted. As such it is not a measure that is very useful in terms of the quality of reproduction, only that it fulfils the basic requirements needed for it.
A related term is bandwidth, but that has both a more tightly defined meaning, and a broader application.