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
"Generally, the human race avoids doing anything radical until forced into it."
- Frederik Pohl
 |
| Sonomagnetic Fabric | ||
| Cloth that gathers sound energy. |
Magnetic fields can be produced by acoustic motions in electrically conducting media, like sea water. A sonomagnetic field can be induced in the ocean by submerged acoustic sources, which imparts a water mass oscillation in the ocean. Water particles crossing flux lines of the Earth's ambient magnetic field experience an induced electric field.
Whether or not this would work in the open air, with a fabric that would turn the resulting sonomagnetic fields into words you could hear, I don't know. Brin makes it work, though.
| They were being scanned again, and it wasn't just someone's True-Vu this time, but real eavesdropping. "Some tokomak's got a big ear on us," Roland reported irritably.
...He looked around quickly, searching for the voyeur... Then he saw the geek - a codger this time - leaning against one of the slender stalks of a sunshade-photocell collector, looking directly at the three of them. And sure enough, amid the bushy gray curls spilling under his white sun hat, Remi saw a thin wire, leading from an earpiece to a vest made of some sonomagnetic fabric. |
| From Earth,
by David Brin. Published by Bantam in 1990 Additional resources -
|
See Sonomagnetic Field Characterization from Induced, Radial Current Waves for a bit more about sonomagnetic fields.
Comment/Join this discussion ( 0 ) | RSS/XML | Blog This |
Additional
resources:
More Ideas
and Technology from Earth
More Ideas
and Technology by David Brin
Tech news articles related to Earth
Tech news articles related to works by David Brin
| Adversarial Pattern Shirts Confound Object Detection Systems |
| A Passing Drone Has Covid-19 Advice |
| Drones Used To Smuggle Contraband Into Prison |
| DARPA's Subterranean Challenge |
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> |
|
|
|
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.
|
'Instantly there appeared standing upon the disk, the image of a man...'
'Your order said for him to be able to be able to work out twists on the gags in the file...'
'So we took pictures of Guzub making a Three Planets, and I could construct this one to do it exactly right down to the thousandth of a second.'
'On the screen they passed in an endless, boundaryless flood of green specks...'
'It drew its power from six square yards of sunpower screens on its low curved roof.'
'He adjusted the n, the r and b knobs, and hopefully anticipated a turn for the better...'
'... stewing warm on their cushion of peritoneum and gorged with blood-surrogate and hormones, the foetuses grew and grew...'
'INVESTIGATE MYSTERIOUS OBJECT ENTERING NEW CALEDONIA SYSTEM FROM NORMAL SPACE'
'The robot cab seemed to know where it was going and, no doubt, the master machine from which it received its signals knew.'
'The racks of gowns itched and quivered, their colors running into blurred pools.'
