There are types of long range hailing and warning devices available. The Improved Acoustic Hailing Device (IAHD) is an exapmle of that which in use today. The IAHD produces highly directional sound beams to project warning tones intelligible voice commands to distances of 300 meters with background noise present at the target location. [ADD REFERENCE] MAYBE PHOTO FROM PG 11 ....?
USFORCETV. (2012, 03 09). Non-Lethal Weapon: Active Denial System (ADS) [Video file]. Retrieved from http://youtu.be/kzG4oEutPbA
