During protests in the USA, security authorities use LRAD systems for announcements and crowd control. How do these "sound cannons" work?

A couple years ago, country rappers Adam Calhoun and Bryan Martin released “FAFO Country,” and if the lyrics – about burying ...

Walk through any school corridor, university campus or train platform today and one sight is almost guaranteed of young people with headphones or earphones firmly in place. Music, podcasts, online ...

I had missed that voice more than I knew. Being able to hear him again — young him, even if he wasn't talking to me, or ...