Experts in acoustics have debunked one of the more esoteric myths of the modern age - that a duck's quack is the only sound that does not produce an echo. The myth has been promulgated as fact by a ...

Daisy the duck has helped a professor of acoustics solve the puzzle of whether quacks echo, Europe's largest general science meeting will be told today. " 'A duck's quack doesn't echo, and no one ...