A Duck's Quack Actually Does Echo—It Just Blends Together
Contrary to the famous urban myth, acoustic lab tests prove a duck's quack echoes just like any other sound.
Why / How?
Acoustics researchers at the University of Salford tested a duck in an echo chamber and outdoors. Because a quack fades gently and smoothly, the returning echo blends seamlessly into the original sound, tricking human ears.