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Is there a formula to predict the loudness of an impact in deciBels?

  1. Mar 1, 2012 #1
    The question really explains the primary question but I have another quick one as well.

    How come sound isn't measured in Joules if it is a form of energy?
     
  2. jcsd
  3. Mar 1, 2012 #2
    [I did not read all the links below fully..if you don't get as answer you like, read them for formulas... one issue and obstacle is different materials make different sounds...feather versus pillow versus water versus metals .......landing on drums, wood,...you get the idea...]

    db is NOT energy...that would be SOUND INTENSITY.

    http://en.wikipedia.org/wiki/Sound_energy_density


    db is a ratio (no units) relative to a standard:

    http://en.wikipedia.org/wiki/Sound_pressure
     
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