The Stark Sonic Cannon is a type of non-lethal long-range acoustic device (LRAD) weapon developed by AccuTech, a subsidiary of Stark Industries. It is capable of emitting an extremely intense, focused field of compressed sound waves that can disable most assailants. A pair were used by the United States Armed Forces during an attempt to capture Hulk at Culver University. Miniature versions of the sonic cannon were built into the Mark II and Mark III versions of the War Machine armor.
In their ongoing military operations to locate and capture Bruce Banner, the United States Armed Forces acquired a pair of sonic cannon outfitted Humvees from Stark Industries, in hopes that the cannons would be sufficient to subdue an enraged Hulk. During an operation to capture Banner at Culver University, General Thaddeus Ross gave the order to use the cannons on a rampaging Hulk. While initially successful at immobilizing Hulk, he was able to escape by destroying one from a distance and jumping out of the other's range.
A creation of Stark Industries, the sonic cannons were developed to be a form of non-lethal anti-personnel weapon, capable of crowd control or non-lethal attacks on enemy armies. The cannons produce a focused field of intense sound waves that immobilize enemies by overloading their sense of hearing. On its highest settings the cannon fires an extremely narrowed, focused field so intense that it causes visible ripples in the air and has enough kinetic force to knock a large assailant like the Hulk off balance.