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Equation for the energy of an acoustic wave?

  1. Aug 13, 2010 #1
    Hi, I have been looking to finding the energy of an acoustic sound wave.
    I keep looking, but its not the exact equation I am looking for. I am look
    for an equation of how much energy is present in a sound wave and how
    it changes over distance.

    Does anyone know?
  2. jcsd
  3. Aug 13, 2010 #2
    The energy in a sound wave is proportional to the square of its amplitude. How its effected by distance can be determined with a combination of conservation of energy, and examining how much area the wave covers.
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