Frequency response is the measure of any system's response at the output to a signal of varying
frequency (but constant amplitude) at its input. In the audible range it usually referred to in connection with
Electronic amplifiers,
microphones and
loudspeakers. Radio spectrum frequency response can refer to measurements of
coaxial cables,
category cables,
video switchers and
wireless communications devices. Subsonic frequency response measurements can include
earthquakes and
electroencephalography (brain waves). The frequency response is typically characterized by the magnitude of the system's response, measured in
dB, and the phase, measured in
radians, versus frequency. The frequency response of a system can be measured by:applying an impulse to the system and measuring its response (see
impulse response)sweeping a constant-amplitude pure tone through the
bandwidth of interest and measuring the output level and phase shift relative to the inputapplying a signal with a wide frequency spectrum (e.g.,
maximum length sequence,
white noise, or
pink noise), and calculating the impulse response by
deconvolution of this input signal and the output signal of the system.simply measuring the output of a system where an input signal isn't practical.
See more at Wikipedia.org...
Free Download Now!
