Whatever keeps that DOD cash flowing… Shameful “science”.
There’s alot of sensitive places that are remotely monitored, so having another means to sense incursion helps. It’s not always about stopping drone bombings
A drone can fly at ~100kph which is ~30m/s, giving you a whole half a second to do anything about it after you have detected its presence lol
If you want to count to 100, you first have to go through 49 … lol.
Probably easily shieldable by balanced coaxial cable etc.
Balanced coax cables wont affect the ELF magnetic field stemming from the physical rotation of the motors, which is what they’re measuring.
Adjusts payload to provide a 50’ blast radius There. All fixed.
More impressive, the same science group claims they can detect water emanating from clouds hundreds or even thousands of feet above them. This has led to the development of a new device, the “umbrella”, to deflect unwanted particles “raining down”.
For my fellow non-Americans, 49 feet is just under 15 meters.
I’m pretty sure we can all spot drones from 15 meters away with just our eyes and ears.
I think the achievement is that they spotted drones from 15 meters away without using anyone’s eyes and ears.
I can detect incoming drones from 49 feet using my ears.
Why does this not sound impressive at all.
Because you haven’t tried it.
So you could hook this system up to a vehicle, like a tank or a troop carrier, and integrate it with a turret, and now you have drone protection. Just look at the havoc Ukrainian drone wrecked on Russian tanks and you’ll see why this could be a big deal.
From… 15 meters away.
It’s impressive because it’s totally passive - radar can locate incoming drones, but also lets the drones locate the radar antenna. This new technique finds the drones without emitting any kind of telltale signal. So the drones don’t know they’ve been spotted, or even that anyone’s looking.
extremely low-frequency (ELF) magnetic field thrown off by its spinning brushless motors.
Now, researchers at Florida International University (FIU) have figured out how to use ELF to spot incoming threat drones
Typical active radar, optical, and acoustic systems face constraints from line-of-sight barriers, environmental background noise, and strict transmission regulations. Passive ELF magnetic sensing reduces these vulnerabilities by covertly capturing motor emissions. This technique operates silently, without broadcasting signals. It offers a stealthy detection alternative unaffected by weather conditions or acoustic interference.
“While the range of our method is limited for now, it costs only a few hundred dollars to develop and could run continuously without any specialized support, unlike radar systems,” Madanayake said.
The FIU team converts a basic physical requirement of drone flight into an effective security trap.
Although a 49 feet detection range remains modest, the system excels in its stealth and low manufacturing cost. A purely passive receiver emits no signals, making it invisible to hostile forces trying to jam or locate defensive sensors. Electromagnetic fields pass through fog, total darkness, and heavy environmental noise, providing reliable detection where optical and acoustic sensors routinely fail.
IDK, It sounds pretty impressive to me
Blind and deaf scientists develop amazing new way to “touch” a drone from 50 feet away using vibrations travelling through the air. “It’s like we’re sensing it from a distance”.
New technique could potentially be developed further to allow people to communicate beyond their reach, potentially even from different (neighbouring) rooms in a house!
Hey look it’s a 💥
Within 49’ you could hear most without special tools
Reject modernity
Feet? In the air?
Is that you Tarantino
🎶like you just don’t care🎶
Woot. Woot.
