Friday, December 16, 2011

Future Riot Shields Will Suffocate Protesters with Low Frequency Speakers

Source: Gizmodo

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. But I imagine the unpleasant experience is not unlike being force choked from afar by Darth Vader. [Google Patents via New Scientist]

The Orwellian 'Non-Lethal' War Waged Against Peaceful Citizens


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Anonymous said...

Maybe noise reducing ear plugs(like musicians and heavy machinery workers use) would be a smart move to bring along to protests and such where they might try using these shields or other sound wave against you. Not sure if it will stop it completely, but if it can block a good portion you would still be able to think strait.

Anonymous said...

Yes, but this affects your breathing, not your ears. We would need to figure out how to send a similar low frequency burst which would basically destructively interfere with the emitting one.
A good thing would be if someone were able to pull both the patents and any "proprietary" information from this device and publish it. We could probably be able to figure a way to neutralize it

Anglo Saxon said...

Ear plugs are completely useless against low frequency sounds. Think booming base being blasted out at a reggae concert, and the like. You FEEL low frequency sounds; you don't 'hear' them.

Yes, such devices can easily be neutralized, but it would cost money and equipment. All you need do is emit the same frequency but transmit it 180 degrees out of phase to the source you are wishing to neutralize.

Such counter-phase sound suppression equipment already exists, but it is normally used to artificially create quiet environments (within buildings or large rooms).

In fact, you can already buy the technology on the high street, in the form of noise-cancelling headphones.

billslycat said...

Industrial wind turbines produce a very similar low frequency noise to this, and the world over, people living close to IWTs complain of a number of symptoms similar to the effect described here.

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