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Acoustic locator
Woody Nuss:
WW2 era sonic defense system. (not concert audio, but cool)
Nathan Riddle:
This reminds me of the Vortex cannons the Nazis' were trying to build to take down airplanes.
Sent from my XT1585 using Tapatalk
Tim McCulloch:
Interesting. Woody, any other pictures of that device? It looks like some kind of Cassegrain-derived design.
Kevin Graf:
Doug Self has a page of 48 of these devices.
http://douglas-self.com/MUSEUM/COMMS/ear/ear.htm
John Roberts {JR}:
--- Quote from: Kevin Graf on November 25, 2016, 01:59:19 PM ---Doug Self has a page of 48 of these devices.
http://douglas-self.com/MUSEUM/COMMS/ear/ear.htm
--- End quote ---
here's an older image of a listening device, but not steerable.
JR
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