Latest By
Category:


Armor
Artificial Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual Person
Warfare
Weapon
Work

"…we store information differently, reading a science fiction story, to make it make sense."
- Samuel R. Delany

Eavesdropping Ray  
  A device that allows others to hear from outside ordinary locked rooms.  

This is a very early reference to the concept of a device or technology that could penetrate a locked room to hear conversations within the room.

Captain Carter added abruptly, "We're insulated here, Halsey?"

"Yes. Talk as freely as you like. An eavesdropping ray will never get through to us."

"...Look here, lads, this is my chance to talk plainly to you. Outside, anywhere outside these walls, an eavesdropping ray may be upon us. You know that? One may never even dare to whisper since that accursed ray was developed."

From Brigands of the Moon, by Ray Cummings.
Published by Astounding Stories of Super Science in 1930
Additional resources -

Here's another quote about using the device:

I set my tiny eavesdropper on the library floor beside me; connected its little battery; focused its projector. Was Miko's room insulated? I could not tell...

I threw the current into my apparatus. I prayed, if it met interference, that the slight sound would pass unnoticed. George Prince had said that he would make opportunity to disconnect the room's insulation. He had evidently done so. I picked up the interior sounds at once; my headphone vibrated with them. And with trembling fingers on the little dial between my knees as I crouched in the darkness behind the cylinder case, I synchronized.

Comment/Join this discussion ( 0 ) | RSS/XML | Blog This |

Additional resources:
  More Ideas and Technology from Brigands of the Moon
  More Ideas and Technology by Ray Cummings
  Tech news articles related to Brigands of the Moon
  Tech news articles related to works by Ray Cummings

Articles related to Surveillance
UK Police AI To Stop Criminals Before They Strike
Chinese Face Recognition Mistakes Bus Ad For Jaywalker
China's Social Credit System - A Facebook-1984 Mashup
Chinese Watrix Gait Recognition Watching You Always

Want to Contribute an Item? It's easy:
Get the name of the item, a quote, the book's name and the author's name, and Add it here.

<Previous
Next>

Google
  Web TechNovelgy.com   

 

 

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

More News

Flying Dragon Robot Transforms In Mid-Air
Terrific prototype video.

Negative Matter Fluid Theorized In New Paper
'Of course, being negative matter, when you push it, it comes toward you..'

Grow Structures Upon Planetfall - Myco-Architecture
'They'll also start pulling in gases and liquids from the local atmosphere...'

MXene Hydrogel Skin For Robots Flexes And Senses
'The plastex swam and whirled like boiling toothpaste...'

EXPLORER, The First Total-Body Scanner
'The object is built up of an infinite series of plane layers, at the focus of the ray...'

UK Police AI To Stop Criminals Before They Strike
'... the computing mechanisms that studied and restructured the incoming material.'

Sonitus Audio Interface Positioned Beyond The Noise
'... an instrument having relatively small bit pieces adapted to be gripped between the teeth.'

Volvo's Self-Driving Mining Trucks
'A procession of automatic ore carts was racing over the bleak slag'

Audi Pop.Up Autonomous Electric Flying Car
'The cab was an egg-shaped bubble of light metals and plastics...'

Music Not Impossible (MNI) Vibrotactile Wearable Experience
Don't you want to experience the 'feely' effects?

More SF in the News

More Beyond Technovelgy

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.