Power law correlation between the rising time, \(\:R\) , and amplitude, \(\:\:A\) , of the detected acoustic emission, AE, signals is investigated in the framework of a driven damped harmonic oscillator model. It is shown, in contrast to the previous model calculation, that \(\:R\sim{A}^{1-{\varphi}_{AE}}\) holds, similarly to the well-known enigma for acoustic emission; \(\:E\sim{A}^{3-{\varphi}_{AE}}\:\) as well as \(\:S\sim{A}^{2-{\varphi}_{AE}}\) , where E and A are the energy and area, and 3 and 2 are the expected exponents from the mean field theory, MFT. The same value \(\:{\varphi}_{AE}=1\) was obtained for all the above exponents and transfer distortions cause mechanism independent changes. For the experimental value \(\:{\varphi}_{exp}={\varphi}_{AE}+{\varphi}_{o}\) is fulfilled, where \(\:{\varphi}_{o}\) is the exponent in the power relation between the amplitude and the rising time of the source function ( \(\:{\varphi}_{o}=-0.32\) beyond the MFT and \(\:{\varphi}_{o}=0\:\) in MFT). The calculated value of \(\:{\varphi}_{AE}=1\) is in good agreement with experimental data obtained for different structural changes: \(\:{\varphi}_{exp}\:0.8\pm\:0.2\) . Universal functions, well scaled together, can be obtained for the temporal avalanche shapes at fixed area normalizing the voltage by \(\:A\) and the time by \(\:R\sim{A}^{1-{\varphi}_{exp}}\) . The first part (around the peak) of it is not sensitive to transfer distortions, while the tail region can be heavily distorted.
