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Famous fact

  1. Sep 20, 2005 #1
    A duck's quack doesn't echo, and no one knows why.

    Can physic explain this fact and how?
  2. jcsd
  3. Sep 20, 2005 #2


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  4. Sep 20, 2005 #3
    I agree. This is a myth. The link provided by robphy says it all.
  5. Sep 20, 2005 #4
    If a quacking duck were to emit a single acoustic phonon, it may reflect off of
    a wall or it may get abosrbed by the wall. And no one knows why since no one
    knows the physical basis of quantum superposition.

    So parts of a duck's quack somtimes make an echo- and no one does know why!
    Last edited: Sep 20, 2005
  6. Sep 21, 2005 #5


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    As much as I am not a fan of the show, but Mythbusters had a segment on this as well. They had an accoustic pro come in with a spectrum analyzer and looked at the quakck in various scenarios. Their pro came to the same conclusion as the referenced article from Snopes.
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