In previous publications the authors introduced the software based measurement system EASERA to be used for measurements with different excitation signals like Sweep, MLS or Noise. The actual approach extends the range of excitations to natural signals like speech and music. This work investigates selected parameters like frequency range, dynamic range and fluctuation of the signal and the signal duration in order to reach conclusions about the conditions required to obtain results comparable with standard excitation signals. In this respect also the limitations of the standard stimuli and the proposed natural stimuli are discussed.
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