“Can you guess what these might have been used for – and where?”
Seen at News Scientist
Audio “radar” used to detect airplanes before radar actually was developed.
Now everyone is talking about the American economy and eclections, nice to read something different. Eugene
My guess is that these were used as alert sirens in the bombing of London during WWII. (?)
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September 5th, 2008 at
Audio “radar” used to detect airplanes before radar actually was developed.
October 22nd, 2008 at
Now everyone is talking about the American economy and eclections, nice to read something different. Eugene
April 15th, 2009 at
My guess is that these were used as alert sirens in the bombing of London during WWII. (?)