by 
Drublic
ANSWERS: 8
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I saw this question asked on the G4tv show Brainiac. It does. They went into this famous hallway where you can get a real good echo and it was like a normal sound.
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Ducks quacks do have echos it's just that the echo is similiar to the quack so it becomes undistinguishable
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Not true. (I recommend reading cornboys' answer as well) They tested this on mythbusters as well. They tested it with technical audio equiptment and everything, they found an echo as well. It seems the misconception comes from the fact that the echo sound reintegrates with the original quack and is hard to hear. It returns very quickly, and sounds like the original. They mix into an indistiguishable quack sound. I hope this helps!
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Here's a great link that offers an explation and downloadable audio samples. http://www.acoustics.salford.ac.uk/acoustics_world/duck/duck.htm
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Funny you should mention this..there was a television program called Sponge on KBS last night that debunked the myth, their quacks DO echo.
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that is just a myth and they busted it on myth busters. click on the link http://en.wikipedia.org/wiki/MythBusters_%28season_1%29#Does_a_Duck.27s_Quack_Echo.3F
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No. This has been disproved. Myth Busters and others.
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No, it is false: http://www.snopes.com/critters/wild/duckecho.asp http://urbanlegends.about.com/gi/dynamic/offsite.htm?site=http://www.physlink.com/Education/AskExperts/ae482.cfm "Both recording sounds can be clearly heard when an echo occurs. Consequently, a duck's quack does echo but it might be hard to hear. The tests revealed that a duck's quack definitely echoes, but the power sound is too low for human ears." Source: http://my.opera.com/edlsantosmz/blog/show.dml/1653250
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