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"My feeling is that the chance of our surviving into the twenty-first century as working civilization is less than fifty percent but greater than zero."
- Isaac Asimov
 |
| Isolation Barrage | ||
| Device prevents eavesdropping. |
Very early example of this idea.
| In the dim metal room of Orentino, the Red Spark's manager, where Foley was waiting for us, a barrage was up. We could hear it faintly humming, and see the little line of blue-yellow sparks snapping along the angles of the walls. Now we could talk. |
| From Wandl, The Invader,
by Ray Cummings. Published by Astounding Stories in 1939 Additional resources -
|
It worked both ways:
It works on video as well as audio:
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. Also, the anti-spying device from from Foundation (1951) by Isaac Asimov.
Halsey
killed our barrage to let the outside connections get through to
us. We all crowded around the
mirror-grid which stood here on
Orentino's desk.
...upon our horrified gaze the
insulated door of the room slid
closed — a blank rectangle of darkness, with the silence and invisibility of the barrage upon it!
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Additional
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More Ideas
and Technology from Wandl, The Invader
More Ideas
and Technology by Ray Cummings
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Tech news articles related to works by Ray Cummings
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