Re: concrete listening

Subject: Re: concrete listening
From: Derek Thompson (Derek.Thompson@arup.com.au)
Date: Sun Apr 25 2004 - 21:45:39 EDT

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And also...

http://www.autogena.org/mirrors/index.html

>>> ea@99asterisk.org 26/04/04 11:26:03 am >>>
during world war I in the UK, very large concrete dishes were built and used
listen for the sounds of approaching enemy aircraft, prior to the invention
of
modern radar and sonar.

does anyone out there know where I could find any information about these
structures, or at the least what they were called so I can ask Google?

thanks,

doug moffat

• Previous message: Matt Rogalsky: "Re: concrete listening"
• Maybe in reply to: douglas moffat: "concrete listening"
• Maybe reply: Derek Thompson: "Re: concrete listening"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

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