This study reports on a theoretical calculation of Hahn's spin-echo experiment in case of a model A(2)B(2) spin system with a strongly coupling character and gives the experimental results of one-dimension H-1 high resolution NMR spectra of taurine and aspartate. The calculated amplitudes of the spin-echoes for two different proton groups of taurine are given. Using results of our calculations for taurine, the computer simulations of J-modulation are implemented. It is shown that the agreement between the experimental and simulated Spectra is good.