This is the largest whispering wall I know of, as it’s 140 meters long. What happens is that the sound hugs the inside of the concrete wall and is transported with surprising loudness to the other side of the dam. Do you know of a bigger whispering wall? Please comment below.
It’s worth not fast forwarding this, because you get a sense of how far the sound travels.
How sound hugs the wall in a whispering gallery amd keeps close to the curved wall.
I am a Professor of Acoustic Engineering at the University of Salford where I carry out research and teaching focussing on architectural acoustics, signal processing and audio perception. I am also an author and radio broadcaster having presented many documentaries on BBC radio and written books for academics and the general public.
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