f_2 = 0.33 kHz f_2 = 1 kHz f_2 = 3.3 kHz f_2 = 10 kHz f_2 = 33 kHz f_2 = 100 kHz G_2 = 10000 G_2 = 10000 G_2 = 5000 G_2 = 3000 G_2 = 1500 G_2 = 1000 f_1/Hz U_met/V U_met/V U_met/V U_met/V U_met/V U_met/V 30 0.29 0.9 0.762 0.825 0.7 0.955 100 0.22 0.84 0.745 0.82 0.695 0.953 300 0.09 0.65 0.7 0.8 0.69 0.953 1000 0.009 0.23 0.537 0.745 0.675 0.948 3000 0.002 0.024 0.222 0.583 0.64 0.934