Hackers Can Turn Everyday Speakers Into Acoustic Cyberweapons

Hackers Can Turn Everyday Speakers Into Acoustic Cyberweapons

But Matt Wixey, cybersecurity research lead at the technology consulting firm PWC UK, says that it’s surprisingly easy to write custom malware that can induce all sorts of embedded speakers to emit inaudible frequencies at high intensity, or blast out audible sounds at high volume.

5G and NZ weather forecasting

5G and NZ weather forecasting

Dr Schmidt, who is also the New Zealand representative for the World Meteorological Organization’s Global Climate Observing System, said the international science community was working with governments to protect radio frequencies vital to earth observations.

The Marines’ New Drone-Killer Aces Its First Test

The Marines’ New Drone-Killer Aces Its First Test

“The system is powerful enough that for a smaller UAV, if it gets close enough, the energy from the jammer will disrupt the electronics on the drone, and cause it to just fail.

Bridgestone's New Tire Makes Driving Electric as Quiet as It Should Be

Bridgestone's New Tire Makes Driving Electric as Quiet as It Should Be

Among other tricks, Bridgestone molded millimeter-high serrations into the trough of each channel to break up the high frequency sounds that result when the tire rolls down the road. Higher frequencies like what you get from pattern noise: As the tire rolls, tiny bubbles of air are compressed between the tread and ground.

The Basic Physics of the Kilogram's Fancy New Definition

The Basic Physics of the Kilogram's Fancy New Definition

Yes, the ΔE is the change in energy levels, f is the jiggle-frequency and h is Planck's constant. The easiest way to perturb a system to get the electron to change energy levels is to use light.

5G Networks Could Throw Weather Forecasting Into Chaos

5G Networks Could Throw Weather Forecasting Into Chaos

Satellites like NOAA's GOES-R and the European MetOp monitor this frequency to collect data that is fed into prediction models for upcoming storms and weather systems.“We can’t move away from 23.8 or we would,” Gerth told WIRED.

How to Land a Plane in 'Non-Normal' Situations

How to Land a Plane in 'Non-Normal' Situations

Now it’s time to navigate a safe flight path (in relation to mountains, storms, air traffic zones, and other aircraft) and communicate with the folks who need to know what you’re doing, or who can help you to achieve a safe outcome.

The Physics of the Doppler Effect, Represented as Tiny Balls

The Physics of the Doppler Effect, Represented as Tiny Balls

Notice how the balls look "bunched up" on the left side of the sound source but spread out on the right side? Here is a plot of the apparent ball frequency for a source moving at 4 m/s with the ball sound speed of 10 m/s.

Blackmore's Lidar Solves Self-Driving Cars’ Need for Speed

Blackmore's Lidar Solves Self-Driving Cars’ Need for Speed

But you can only measure where something’s going, and how fast, if you manage to hit it again and again.Blackmore's lidar reads the velocity of the objects it detects: The things moving away from the vehicle are in red, those moving toward it are in blue.