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Resonant frequency problem

  1. Oct 15, 2016 #1
    1. The problem statement, all variables and given/known data
    A 2-year old child has an outer ear length of approximately 1.7 cm (compared to 2.5 cmfor an adult). Find the resonant frequency of the outer ear of the average 2 year old
    b.Draw a diagram of the natural harmonic for the child’s ear.
    2. Relevant equations
    f=v/waveleng
    where wavelengt= 4L

    3. The attempt at a solution
    for a, i used the equation, for baby i got 343/0.068= 5.04KHz am i right?
    Also for b, do i need to draw the damped version of the graph? cheers.
     
  2. jcsd
  3. Oct 15, 2016 #2

    kuruman

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    You are correct on (a)
    For (b) you need to draw the fundamental waveform that you used to answer part (a). I am not sure what you mean by "damped version."
     
  4. Oct 15, 2016 #3
    Hi, so the one on which the graph rises at 5khz and the falls back down. so what i mean is it's moving straightline as it approaches 5khz, it will rise then decrease as we pass the 5. is it right?
     
  5. Oct 15, 2016 #4

    kuruman

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  6. Oct 15, 2016 #5
    ohhh so you mean the tube one? in which it has a close at one end?
     
  7. Oct 15, 2016 #6

    kuruman

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  8. Oct 16, 2016 #7
    like for you son <3
     
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