Sound wave extinguishing fire

 

That's brilliant! Thanks.

 

Meh. Not gonna work on a big scale.

There is also LRAD.

 

Not deadly enough for American police.

 

But banned in most of the world (Geneva Convention) except for US and China..
Actually it's used quite extensively

 

You can also extinguish flames with high explosives. It's the same principle.
Create enough pressure to starve the flame of oxygen. It's a tad destructive though

 

They used the LRAD or similar devices recently at a Concert in New Jersey. Some hiphop event.

Fucking Insane

People enjoying music, getting a bit disruptive. Its because it had hiphop. So.. It had black people. And you know that means police need extra and excessive force!

Half the point of concerts was to get rambunctious. Now we are all supposed to be there, seemingly in a k-hole. Just brain dead.