1. A method for determining an averaged frequency-dependent transfer function for a linear time-invariant system by an evaluation device, wherein the method comprises: providing frequency-dependent reference signals at an input channel of the evaluation device, wherein the frequency-dependent reference signals are derived from excitation signals applied to a linear time-invariant system, providing frequency-dependent measuring signals at the input channel of the evaluation device, wherein the frequency-dependent measuring signals are determined for the linear time-invariant system in response to an excitation of the linear time-invariant system with the excitation signals, and wherein the frequency-dependent measuring signals are associated with the frequency-dependent reference signals, and determining, by the evaluation device, an averaged frequency-dependent transfer function for the linear time-invariant system, in that using signal deconvolution of associated measuring signals and reference signals selected from the frequency-dependent measuring signals and the frequency-dependent reference signals, frequency-dependent transfer functions are determined block-by-block such that for each block of associated measuring signals and reference signals a transfer function is determined and the frequency-dependent transfer functions are averaged, wherein when determining the averaged transfer function at least a part of the determined frequency-dependent transfer functions is included in the averaging corresponding to a respectively associated frequency-dependent weighting.