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A bandwidth-efficient recursive implementation of th-order equalization is developed in order to correct the inherent baseband distortion in parametric loudspeakers. Assuming that the nonlinear system is largely quadratic, a substitution of it can be made by using an analytic pair of all-pass sections cascaded with a squared magnitude block. The all-pass sections comprise of a delay block and an approximate linear-phase infinite impulse response (IIR) Hilbert transformer to give a Hilbertdoi:10.1109/tsa.2005.855830 fatcat:wvwblsrl2ze43gktnqjkghp5hi