Topic: Acoustic locator (Read 6738 times)

Woody Nuss · « **on:** November 18, 2016, 05:09:22 pm »

WW2 era sonic defense system. (not concert audio, but cool)

Nathan Riddle · « **Reply #1 on:** November 20, 2016, 09:21:44 am »

This reminds me of the Vortex cannons the Nazis' were trying to build to take down airplanes.

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Tim McCulloch · « **Reply #2 on:** November 25, 2016, 11:42:27 am »

Interesting. Woody, any other pictures of that device? It looks like some kind of Cassegrain-derived design.

Kevin Graf · « **Reply #3 on:** November 25, 2016, 01:59:19 pm »

John Roberts {JR} · « **Reply #4 on:** November 25, 2016, 05:05:07 pm »

Doug Self has a page of 48 of these devices.

http://douglas-self.com/MUSEUM/COMMS/ear/ear.htm

here's an older image of a listening device, but not steerable.

JR

Ivan Beaver · « **Reply #5 on:** November 25, 2016, 05:51:44 pm »

here's an older image of a listening device, but not steerable.

JR

Of course it was steerable. It just took a lot of preplanning

g'bye, Dick Rees · « **Reply #6 on:** November 25, 2016, 09:17:36 pm »

Texas headphones.

David Buckley · « **Reply #7 on:** November 26, 2016, 09:58:54 pm »

The Brits built a few non-steerable(!) sound mirror walls during the early part of the last century, pictures and info here.

Stu McDoniel · « **Reply #8 on:** April 20, 2017, 02:01:41 pm »

WW2 era sonic defense system. (not concert audio, but cool)

I saw a fascinating program on PBS on owls a week or so ago.
An owl has one ear higher then the other to aid in location of prey.
Amazing creatures.

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