LRAD

We seem to accept noise pollution as routine. From omnipresent aircraft to the perpetual insanity of leafblowers and back-up beepers, the cacophony is relentless. I've often read social media retorts where unsavory folks use yard machines to intentionally annoy neighbors. 

Does anyone find this sad or troubling that a speaker can be a weapon?

Kate Bush has a wonderful song called 'Experiment IV', which is about a secret military experiment to build a weapon that would create a sound that could kill someone. Great song and great video to go with it. 

I know a very very good mech engineer that works for the company. They are local to me. The company supplies their products to the police, fire and military, primarily. Although a few billionaires have been known to buy their gear as well. 

The company has nothing to do with consumer audio, but i think if they did dip their toes into those waters, they could do well.

BTW, their products are not designed for crowd control, more for public address notification.