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A question about propagation constant in wave propagation equation

  1. Feb 9, 2009 #1
    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.
     
  2. jcsd
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