The distributions of the maximum T_R from each simulated data for the corresponding wave bands. ﹩{T}_{{\rm{R}}}={\rm{\max }}(2{I}_{j}/{S}_{j})﹩ is calculated from each simulated PDS and LS periodogram, where I_j is the power at frequency f_j and S_j is the best-fit power-law value at that frequency. The dashed red and green lines indicate ﹩{T}_{{\rm{R}}}^{{\rm{obs}}}﹩ at the fundamental and harmonic frequencies, respectively.