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Homework Help: Sound Intensity formula

  1. Feb 12, 2004 #1
    The upper limit of the intensity level of sound waves is about 194 dB. This intensity corresponds to 100% modulation of the air; that is, the amplitude of the pressure oscillations corresponds to that of atmospheric pressure. What intensity (W/m^2) would be required to generate this level of sound?

    Can I use the formula [tex] L = 10\log{\frac{I}{I_0}} [/tex]?
    Because I don't know what to use as the reference intensity level...
  2. jcsd
  3. Feb 13, 2004 #2


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    Science Advisor

    Io is called the threshold of hearing (sp?) and if I'm not mistaken, its value is 10^-12 W/m^2

    I get the answer as being 2.5119x10^7.
  4. Feb 14, 2004 #3
    yes the value is correct
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