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Intensity and Intensity Level of Two Sounds

  1. Apr 27, 2012 #1
    1. The problem statement, all variables and given/known data

    Sound 1 has an intensity of 39 W/m^2. Sound 2 has an intensity level that is 2.5 dβ greater than the intensity level of sound 1. What is the intensity of sound 2?

    2. Relevant equations

    I=energy/area*time
    β=10dβ*log(I/Io)
    Io=10^-12 W/m^2

    3. The attempt at a solution

    Sound 1:
    I= 39 W/m^2
    β= 10*log(39/10^-12)
    β=133.9106

    Sound 2:
    I=?
    β= 2.5β1
    β=399.7766
    339.7766=10*log(I/10^-12)
    33.97=log(I/10^-12)
    10^33.97=I/10^-12
    I=9.33*10^21

    This is the answer i keep getting for I of sound 2 but it is telling me this is incorrect
     
  2. jcsd
  3. Apr 27, 2012 #2

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