Transfer Function 2
Transfer Function 2 : In general terms the Laplace or Fourier transform of the impulse response of a linear system (filter, sensor, etc.). It is equivalent to the Laplace or Fourier transform of a broadband output signal divided by that of the input signal. In seismology the transfer function of a seismic sensor-recorder system (= seismograph), or of the Earth medium through which seismic waves propagate, describes the frequency-dependent amplification, damping and phase distortion of seismic signals by a specific sensor-recorder devise (or the propagation medium). The amplitude (or absolute value or modulus) of the complex transfer function is termed the amplitude-frequency response function or magnification curve of a seismograph. The influence of the related phase response on the seismic wave forms is often ignored in the classical routine observatory practice of amplitude measurements, yet it has to be taken into account for correct simulation of the transfer function. See section 5.2.7 of Chapter 5 in this Manual and and Scherbaum (2002)
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