Quack Echos

Out walking the dogs tonight, we noticed a large gathering of ducks.
It was nice to see Bernard (son of Gerard the Albino Canard).
Bernard is a black duck with a distinctive white head that hovers around Uppermill, and seems to have his dad's stalking technique down to a tee.

Anyway, I digress. One of the ducks was particularly vocal with very loud quacks, that did distinctly echo around the area, thereby dismissing the urban legend that duck's quacks do not echo.

A little research on the Internet showed those clever chappies at Salford uni have already done some extensive research into this