Fig. 1

Sketch showing the concept of SNR deterioration (SNRD). The SNR is calculated as the difference between the power of signal and the noise (in dB). The signal is the power at \(\omega _{SSR}\) and the noise is the mean power from \(\omega _{low}\) to \(\omega _{high}\), not including \(\omega _{SSR}\). The SNRD is the difference between the SNR in the relaxed condition and the artifact condition in dB