The wide-beam sonic stunner was a weapon used notably with the Juggernaut war droid around 4800 BBY.
It was a chassis mounted weapon that fired focused waves of sound around the general perimeter of the droid to deter any enemy forces who managed to get too close to it. Although the weapon itself was intended to keep infantry units from closing in too near, adjustments could be made to transform the weapon from a non-lethal weapon to being capable of shattering the bones of an average humanoid; a feature also necessary for effecting beings more or less sensitive to the sound waves than others.
Similar devices where often used as perimeter defense weapons for other war machines and high value installations.