Is it true that a duck's quack does not echo?

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Joel Bergman

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Is it true that a duck's quack does not echo?
« on: 21/12/2009 21:30:03 »
Joel Bergman asked the Naked Scientists:
   
Hi Chris
  
Is it true (and if so why??) that a duck's quack does not echo?
  
Your comment would be appreciated.
  
Thanks
Joel Bergman

What do you think?
« Last Edit: 21/12/2009 21:30:03 by _system »

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Offline glovesforfoxes

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The animals of the world exist for their own reasons. They were not made for humans any more than blacks were made for whites, or women for men. - Alice Walker