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"I did more research, and realized I almost would rather be a biologist than a writer, because there was incredible stuff going on!"
- Greg Bear
 |
| Anti-Spying Device | ||
| Foolproof means of defending against spy beams. |
| It was not a large office, but it was quite spy-proof and quite undetectably so. Spy-beams trained upon it received neither a suspicious silence nor an even more suspicious static. They received, rather, a conversation constructed at random out of a vast stock of innocuous phrases in various tone and voices. |
| From Foundation,
by Isaac Asimov. Published by Doubleday in 1951 Additional resources -
|
Compare to the cone of silence From Cease Fire (1958) by Frank Herbert, hush corner by Robert Heinlein in Double Star and the Fenton Silencer from an early Arthur C. Clarke story.
The earliest example I know of is the isolation barrage from Wandl, The Invader (1939) by Ray Cummings.
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'The figure seemed to be swimming toward the surface.'
'...Men don't want real women anymore. You and I are behind the times...'
'Our beams feed these worlds energy drawn from... the Sun.'
'... the perpetual beam carved in the robot face of the bartender, the classic Irish grin.'
'To recharge the batteries, which can be done in almost every town and village...'
