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The peak normalized error plotted as a function of the computation time for the FNM/time-space decomposition method, the impulse response method, and methods that approximate the impulse response. These errors and times are evaluated for transient near-field calculations of an equilateral triangular source with sides equal to 4 wavelengths. The excitation for these calculations is a Hanning-weighted pulse with a center frequency of 2 MHz.
