The essential feature of the seismic wave propagation in viscouselastic media is the attenuation of its energy. Generally speaking, the attenuation can be classified into two categories, one is related to the seismicwave propagation, and the other is related to the characteristics of the strata. One of the most important parameters that scale the degree of attenuation is Qfactor. This paper discusses the stability of spectral analogspectrum ratio method to interference and noise.