Fig. 6
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40623-017-0746-8/MediaObjects/40623_2017_746_Fig6_HTML.gif)
FW H/Vs of target two-layered media with different impedance ratios (Left: V s2 = 4V s1, Middle: V s2 = 6V s1, Right: V s2 = 8V s1) for three different Q values (Q = 500, orange; Q = 100, black; Q = 50, blue), and SW (red) H/Vs of cap-layered media (V sCap = 2V s2, Depth = 10λ 0)