Sound Weapon

Clyd3 · Feb 27, 2006

Hi, i need to make a directional sound weapon
DIRECTIONAL
i've read about them all over, used in ships
some cops had handheld versions

can you guys help me by suggesting frequencies and speakers / amps capable of such sound
as well as how i can go about directing the sound

Nigel Goodwin · Feb 27, 2006

Are you sure you didn't read about then in a fictional book?.

Clyd3 · Feb 27, 2006

well, NO, DEFINITELY NOT

its not like they're physically damaging the people

let me rephrase my goal - a directional noisier/louder siren

Styx · Feb 27, 2006

Clyd3 said:
well, NO, DEFINITELY NOT

its not like they're physically damaging the people

let me rephrase my goal - a directional noisier/louder siren

So perferated eardrum's and nosebleeds dont count anymore as physical damage?

justDIY · Feb 27, 2006

they do exist, but good luck finding much of anything crediable to read about them - employed by US Navy, Police and Cruise Ships --- also used on the poor people of New Orleans, when they asked the govt for help

try searching for "sonic weapon" "crowd control"
https://www.npr.org/templates/story/story.php?storyId=4857417
https://news.bbc.co.uk/2/hi/africa/4418748.stm
**broken link removed**

Roff · Feb 27, 2006

justDIY said:
they do exist, but good luck finding much of anything crediable to read about them - employed by US Navy, Police and Cruise Ships --- also used on the poor people of New Orleans, when they asked the govt for help

try searching for "sonic weapon" "crowd control"
https://www.npr.org/templates/story/story.php?storyId=4857417
https://news.bbc.co.uk/2/hi/africa/4418748.stm
**broken link removed**

Can you provide a reference that states that this weapon was actually used in New Orleans? There is no doubt that it was there, but I could find nothing that said it was used.

nsklavos · Feb 27, 2006

Goto AMAZING1.COM and click on ULTRASONICS. They have plans & kits.

justDIY · Feb 27, 2006

Ron H said:
Can you provide a reference that states that this weapon was actually used in New Orleans? There is no doubt that it was there, but I could find nothing that said it was used.

nope - that last statement is unsubstantiated speculation ... I just jumped to conclusions after seeing the picture of a guy in fatigues standing in a military looking humvee with his hand on the sonic weapon, outside the Superdome, in New Orleans.

Roff · Feb 27, 2006

justDIY said:
Ron H said:

Can you provide a reference that states that this weapon was actually used in New Orleans? There is no doubt that it was there, but I could find nothing that said it was used.

Click to expand...

nope - that last statement is unsubstantiated speculation ... I just jumped to conclusions after seeing the picture of a guy in fatigues standing in a military looking humvee with his hand on the sonic weapon, outside the Superdome, in New Orleans.

If it had actually been used, we would still be hearing about it.

Clyd3 · Feb 28, 2006

whether its been used or not is irrelevant to me

can u guys give me tips on how to make sound very directional
or at least directional in some way

i'm working on finding a nice set of frequencies and speakers which wont blow too quickly

Nigel Goodwin · Feb 28, 2006

Clyd3 said:
whether its been used or not is irrelevant to me

can u guys give me tips on how to make sound very directional
or at least directional in some way

i'm working on finding a nice set of frequencies and speakers which wont blow too quickly

Most speakers are directional, horn speakers would probably be more so than most?.

I'm still of the opinion though that such devices are more speculation than actual fact! - although a GREAT deal of military research has been done on the subject.

What has just been mentioned recently in the UK is a device to stop groups of youths collecting in particular spots (outside a shop for example). The idea is a high frequency tone which older people won't be able to hear, but will cause the youths to go elsewhere!.

This strikes me as about as practical as any other sound weapon!.

William At MyBlueRoom · Feb 28, 2006

They exist; Long Range Acoustic Device, or LRAD and were used on a cruise ship to repel pirates recently.

**broken link removed**

**broken link removed**

I was amazed when I saw it on CNN originally.

Optikon · Feb 28, 2006

Nigel Goodwin said:
Clyd3 said:

whether its been used or not is irrelevant to me

can u guys give me tips on how to make sound very directional
or at least directional in some way

i'm working on finding a nice set of frequencies and speakers which wont blow too quickly

Click to expand...

Most speakers are directional, horn speakers would probably be more so than most?.

I'm still of the opinion though that such devices are more speculation than actual fact! - although a GREAT deal of military research has been done on the subject.

What has just been mentioned recently in the UK is a device to stop groups of youths collecting in particular spots (outside a shop for example). The idea is a high frequency tone which older people won't be able to hear, but will cause the youths to go elsewhere!.

This strikes me as about as practical as any other sound weapon!.

yeah they do exist.. I recall reading a documentary (years ago) about military experimentation with them way back in the 1940's. The experiments were real. The results however, are controversial (but then again almost anything you read could be) I don't have any details or links but I recall that they used very low frequencies such as 0.1Hz to 10Hz. At low power levels they could induce extreme nausea in the target person. At higher levels they could shake apart brick walls and rupture internal organs (resulting in death) And I think I remember reading about a horn shaped device for directional control!

chemelec · Feb 28, 2006

Yes they Exist. The Real Problem is Making the Transducer that will be Very Specific for the Intended Frequency and Power.

Quite a few Years ago, the UK had a HIGH POWERED, Low Frequency device that was mounted on a truck for riot control.
I Believe it operated at about 16 Hz and caused Bowel disfunction, Considerably Disabling the intended persons.

Nigel Goodwin · Feb 28, 2006

chemelec said:
Yes they Exist. The Real Problem is Making the Transducer that will be Very Specific for the Intended Frequency and Power.

Quite a few Years ago, the UK had a HIGH POWERED, Low Frequency device that was mounted on a truck for riot control.
I Believe it operated at about 16 Hz and caused Bowel disfunction, Considerably Disabling the intended persons.

Have you ever seen Mythbusters? - they tested this myth, and found no truth in it.

As a UK resident I've NEVER heard of such a device being used for riot control in the UK.

Roff · Feb 28, 2006

I just skimmed over this, but **broken link removed** seems like it is relevant to this thread.

justDIY · Feb 28, 2006

Wow, thats a good find Ron

I like this one:

High-frequency, non-diffracting (i.e., non-penetrating) acoustic bullet creates plasma in front of target (effect Blunt-object trauma

plasma - as in ionized gas ... from sound waves? neat

i_build_stuff · Feb 28, 2006

I saw something on TV about those sometime in the last couple years. It was basically a short, fat pulse jet (like the ones people build for R/C airplanes).

Clyd3 · Feb 28, 2006

Nigel Goodwin said:
Clyd3 said:

What has just been mentioned recently in the UK is a device to stop groups of youths collecting in particular spots (outside a shop for example). The idea is a high frequency tone which older people won't be able to hear, but will cause the youths to go elsewhere!.

This strikes me as about as practical as any other sound weapon!.

Click to expand...

I googled that and yeah, thats about as practical as i need
thanks
i'll post my progress

edit:
hey! how about this: if i make a setup which switches its output frequency between 20kHz and a slightly lower frequency (so olders can hear it) and then step it down to 20Hz or slightly higher
and then switch between those 3 or 4 frequencies every second or so

also i liked this one too:
https://en.wikipedia.org/wiki/Sonic_weaponry

it is a hobiest project so i'm not intending it to cause harm
just discomfort i suppose
sounds like fun and i need something to do

sheesh ron, nice article that still reading it

steven · Mar 3, 2006

8) infrasound hmm go to the free information society on the net you will find the free circuit schematics to biuld these

Sound Weapon

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