[MindBender26]

Overcast clouds can also reflect sound back to ground. In Clearwater, Florida, in the 60s, on a very quiet, high overcast cloud night, with strong east winds, you could hear the large missiles launch from the Cape 120+ miles away. Of course they are very loud to start with, but thetas a lot more then 7 miles.

[singletrack]

Before the highways and noise of modern life, Niagara Falls could be heard in Toronto roughly 70miles away.