Now I'm studying acoustic waves. One question in my mind is propagation constant. It is: [tex]\gamma = \alpha + j*\beta[/tex] while the [tex]\alpha[/tex] is attenuation constant, [tex]\beta[/tex] is phase constant. Phase constant I can understand and calculate, but how about the attenuation constant. The literature says it is: e^[tex]\alpha[/tex] = abs(A0/Ax) where A0 is the amplitude at the source of the wave, Ax is the amplitude at some x distance of the wave. what my question are: Is there any other way to find out or calculate the attenuation constant. Since I'm doing a simulation of an acoustic wave, I cannot give correct parameter without knowing the attenuation constant.