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Homework Help: Total Power output Sound

  1. Mar 2, 2012 #1
    Total Power output Sound!!

    All right, nevermind, problem resumed.

    . A rock band has an average intensity level of 110 dB at a distance of 15 m from the speakers. Assuming the sound is radiated equally over a hemisphere in front of the band, what is the total power output?

    Relevant Equations
    Intensity=Power/area
    A=4pir^2

    Attempt at solution
    A=4pi(15)^2
    A=2827m^2
    2827/2 (hemisphere)

    110=p/1413
    110x1413=
    an answer that is not one of the multiple choice solutions...
     
    Last edited: Mar 2, 2012
  2. jcsd
  3. Mar 2, 2012 #2

    berkeman

    User Avatar

    Staff: Mentor

    Re: Total Power output Sound!!

    Problem resumed, or problem solved?
     
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