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Homework Help: Doppler effect

  1. Sep 9, 2005 #1
    How can we apply the doppler effect when the source of sound is coming towards us at supersonic speeds?Is there a mathematical method for it?
  2. jcsd
  3. Sep 9, 2005 #2
    The velocity of the source is built into the Doppler formulas. Plug it in, see what happens. I imagine the source would hit you, you would die, then the sound would arrive and you'd be too dead to hear it.
  4. Sep 12, 2005 #3
    The frequency comes out to be negative.How is this possible? o:) Assume that I am alive to think about this.
  5. Sep 12, 2005 #4
    The frequency is negative because the first noise you hear is the last one the source made. The source will always be emitting ahead of the last sound it made.
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