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Homework Help: Doppler Effect (2nd)

  1. Jan 22, 2009 #1
    At a distance of 20m from a source of sound, the sound level is 40dB. If the observer backs up to a distance of 40m from the source, what will the sound level be?

    Basically, I said that the sound level halved = 20dB. Correct?
  2. jcsd
  3. Jan 22, 2009 #2
    not necessarily, do you have any equations with which to calculate this?
  4. Jan 22, 2009 #3
    No. This is why I am assuming that it just halves haha.
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