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Homework Help: Intensity of sound wave and energy

  1. Nov 28, 2016 #1
    1. The problem statement, all variables and given/known data

    A sound wave with intensity 2x10^(-3) W/m^2 is perceived to be modestly loud. Your eardrum is 6.0 mm in diameter. How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?

    2. Relevant equations
    =2x10^(-3) * (pi (6x10^-3)^2)
    =2.2610x10^-7 W

    3. The attempt at a solution
    =2x10^(-3) * (pi (6x10^-3)^2)
    =2.2610x10^-7 W

    P=delta E/ delta t
    =2.2610x10^-7 J/s * 60 s
    =1.3572x10^-5 J

    ..its not the correct answer can anyone help?
  2. jcsd
  3. Nov 28, 2016 #2


    User Avatar

    Staff: Mentor

    Hi Pambos, Welcome to Physics Forums!

    Check your area calculation.
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