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Doppler effect problem! (observer is moving away)

  1. Feb 12, 2015 #1
    Ben is walking in a park in a straight line at 1.2 m/s. A bird is hiding in a bush. When Ben is closest to the bush, he is 2 m away from the bird and he hears a 10 dB sound. How long will he continue to hear the bird?

    Thanks for your help!
     
  2. jcsd
  3. Feb 12, 2015 #2

    NascentOxygen

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  4. Feb 12, 2015 #3

    Dick

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    This isn't about the doppler effect. A speed of 1.2 m/s won't affect frequency much. It's more about how distance affects sound intensity. There are some assumptions to be made here.
     
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