According to this bizarre rumor, a duck’s quack has some special sonic property that causes it not to echo.
Anyone who has used the Internet more than a week has probably received at least one of those annoying lists of “facts”: dozens and dozens of items of no real significance that somebody thought would be cool for you to know. It is indeed fortunate that the lists are usually composed of
Fortunately, we now have more than my personal experience to offer in debunking this myth, as an acoustic research experiment carried out in 2003 by Trevor Cox of the acoustics research center at the University of Salford in Greater Manchester set this legend to rest: “A duck quacks rather quietly, so the sound coming back is at a low level and might not be heard,” Cox [said].
Convincing a farm to lend us a duck and transporting it to the laboratory were probably more time-consuming than the actual experiments. First we placed Daisy in the anechoic chamber and made a baseline measurement of an echo-free quack. Theis an ultrasilent room where sound does not reflect from the walls; it is without echoes, as the name implies. It was important to have a reference sound without echoes; after all, this was a serious piece of science and not a bit of Friday afternoon fun.
France Dernières Nouvelles, France Actualités
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