Future Riot Shields Will Suffocate Protestors with Low Frequency Speakers

By Andrew Liszewski - Gizmodo

Dec 14, 2011

It's not the first crowd control tool to use sound waves, but Raytheon's patent for a new type of riot shield that produces low frequency sound waves to disrupt the respiratory tract and hinder breathing, sounds a little scary.

Crowd control tools like the LRAD Sound Cannon emit bursts of loud and annoying sounds that can induce headaches and nausea. But Raytheon's non-lethal pressure shield creates a pulsed pressure wave that resonates the upper respiratory tract of a human, hindering breathing and eventually incapacitating the target. The patent points out that the sound waves being generated are actually not that powerful, so while protestors might collapse from a lack of oxygen reaching their brains, their eardrums won't be damaged in the process. Phew!

And like Roman soldiers joining their shields to form a large impenetrable wall, these new riot shields can actually be networked together to form a larger acoustical horn, vastly improving their range, power, and effectiveness. There's no word on what the long-term medical implications might be if you find yourself on the wrong side of one of these shields.

Officials unveil high-tech ray gun to be installed in county jail

Published on 08-22-2010 | Pasadena Star News

CASTAIC - A high-tech ray gun built for the military that fires an invisible heat beam capable of causing unbearable pain will be tested on unruly inmates in the sheriff's detention facility in Castaic, officials said Friday at an unveiling event.

The Assault Intervention System (AIS) developed by the Raytheon Co., could give the Sheriff's Department "another tool" to quell disturbances at a 65-inmate dormitory at the Pitchess Detention Center's North County Correctional Facility, said Cmdr. Bob Osborne, head of the technology exploration branch of the sheriff's Department of Homeland Security Division.

The 600-pound, 7-foot-tall device won't replace traditional methods such as tear gas, rubber bullets and batons, Osborne said.

"We're looking to see if we can exploit this science for the benefit of the Corrections Department," he said.

AIS fires a directed beam of invisible "millimeter waves" that cause an unbearable burning sensation by penetrating 1/64 of an inch into the skin, where pain receptors are located, said Mike Booen, Raytheon's vice president of advanced security and directed energy systems.

The beam, which is about the diameter of a compact disc, causes an instant and intolerable burning sensation when it touches skin, but the sensation stops instantly when the device is turned off or the target moves out of the beam.

At a news conference, several people volunteered to feel the effects of the machine first-hand.

Sheriff's Deputy David Judge manned the controls and fired the beam, using a joystick and a monitor, not unlike a video game, to aim the ray gun's camera.

Judge simply aligned cross-hairs in the center of the screen with his target and pulled the trigger. The beam can be targeted very precisely, allowing deputies to single out one person or even a specific body part.

One volunteer was able to stand in the beam's path for just 1.8 seconds before the heat sensation forced him to step out of the way.

"I don't care if you're the meanest, toughest person in the world. This will get your attention," Booen said.

The machine is designed to emit a burst of no more than three seconds with each trigger pull, but deputies can repeatedly fire the weapon as needed.

Similar devices have already been sold to the U.S. military, however the machine demonstrated Friday is the first to be placed in an American correctional institution, sheriff's officials said.

It is being installed as a test case at no cost to the Sheriff's Department, as part of a program through the National Institute of Justice, officials said.

"Millimeter wave" devices have been tested on more than 10,000 subjects so far and has been shown to cause no lasting injuries, Booen said.

"It's very, very safe," he said.

The unit at the Pitchess Detention Center has a range of 80 to 100 feet, which is more than enough for the dormitory space it's to be used in.

Raytheon, as a matter of policy, does not disclose the cost of the machines, Booen said, adding that he could not comment on how the military has used the devices.

When asked if the public can expect to see similar AIS devices mounted on patrol cars in the future or attached to deputies' utility belts, Osborne said, "not in my lifetime."

But Booen said his company is working on much smaller versions of the AIS. Progress on that research is a closely held secret, he added.

"That's our vision," said Booen. "We want to get to the point where it is a hand-held device."