In signal processing, the cascade combination of two systems means that the output of the first system is fed as input to the second system. ![[learnius/slp/4 Speech Signal Representations/attachments/slits-assoc-cascata.svg]] $ h(t) = h_1(t) \ast h_2(t) $ The overall transfer function of the cascaded system is simply the product of the individual transfer functions of each system. $ H(z) = H_{1}(z) H_{2}(z) $