http://broadcast.palefire.com The Pale Fire Archives Mon, 31 Jan 2011 22:13:57 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 http://broadcast.palefire.com/2010/01/listening-devices/ http://broadcast.palefire.com/2010/01/listening-devices/#comments Mon, 04 Jan 2010 22:59:39 +0000 Andrew http://broadcast.palefire.com/?p=142 Whilst boffins in England were building concrete behemoths for their ‘Sound Mirrors’ to collect and amplify sounds to detect incoming enemy planes and Zeppelins across the Channel, it seems the Dutch were looking at amplification on more personal format.. I’m not sure if they preserved with these explosions of ear trumpet oddities but the English obsession with acoustic technology of this sort ended with the invention of RADAR in 1935.

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