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Echoes and echoes how far can a sound travel
A science note explains echoes from walls cliffs and surfaces and how distance affects listening time. It cites calculations using three seconds total for a round trip to a surface three tenths of a mile away and notes how hard smooth walls produce clearer echoes. A call for a practice leaflet and a Kentucky trivia item follow.
MENTIONED IN THIS ARTICLE
Hamilton
U.S. Marshall
Cincinnati
John B. Mullins
Harold J. Carpenter
Carpenter
Mullins
Ohio