In 2005, a cruise ship was armed with LRADs, when attacked by pirates toting machine guns and other heavy hitting artillery. The pirates engaged the LRADs and turned away. The LRADs are used in the Iraq and Afghanistan wars with similar results. Homeland security is equipped and police swat teams are using them to control crowds.
LRAD is an acronym forLong Range Acoustic Device. This weapon has been known to bring people to their knees in pain from the sound. Some persons have become very sick from the vocal extreme. There are several videos of SWAT teams using it on our our college students to break up riots. Even though it sounds horrible, it does beat the alternative of gun fire.