Chinese scientists develop handheld sonic weapon for crowd control

submitted by Robin from (scmp.com)

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[–]bobbobbybob 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (3 children)

yeah, its not going to work.

I designed long range acoustic weapons in the 90s. The problem with low frequencies is that in order to make them directional, your horn mouth needs to be larger than the wavelength. since the stuff that makes you puke is 6-8Hz, that makes for building sized horns.

So you can't make the low frequencies at source (unless they are somehow creating a soliton).

What you do is use ultra high frequencies (20kHz up) and the principle of 'beat frequencies' - as two ultrasonic beams with slightly different frequencies cross, they go in and out of phase, and you can use this to generate a high energy, low frequency 'source' at a distance. You can also use them to make a voice appear in thin air, or make someone hear God, if you wanted to. I'm pretty sure this is the principle behind the LRAD's operation.

But a tiny rifle, making low frequencies at source? It will propagate everywhere, directionless. Hitting friend and foe alike. Unless they've managed to get it to form a scalar wave. Not something that anyone I know has succeeded at yet.

[–]Optimus85 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (2 children)

5G Radiation Already Used In Crowd Control

It might sound difficult to believe but the 5G frequencies which will soon be blanketing our neighborhoods have been under development for a number of years by defense agencies, including the U.S., Russian and Chinese, as a means of crowd control. The US army uses Millimeter waves in crowd dispersal guns called Active Denial Systems. Dr. Ben-Ishai explains, “if you are unlucky enough to be standing there when it hits you, you will feel like your body is on fire.”

[–]bobbobbybob 4 insightful - 1 fun4 insightful - 0 fun5 insightful - 1 fun -  (1 child)

sound is a (longitudinal) compression wave, conducted in a medium

5G is an (transverse) electromagnetic wave, doesn't require a medium.

Maybe it is an RF weapon, but then it wouldn't require a gas resonating at a low frequency

[–]Optimus85 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 2 fun -  (0 children)

Oh crap, you're right. Should've read the article first. I was trying to find some info on the effects of low-frequency sound waves then got sidetracked by the article which I was referring to. That and weed.