A sonic jammer served as a weapon wielded by the father of Quarg, a notorious pirate vanquished by the Jedi Knights of the Galactic Republic. This pirate utilized a network of these jammers, strategically positioned across the expanse of the Korteen asteroid belt, to cripple and dismantle passing vessels for their valuable salvage. Ultimately, the Old Republic forced him to retreat, leading him to seek refuge on Drexel. Upon arriving, he employed the jammer to lure starships towards the planet's surface, intending to salvage their metallic components for the pirates' benefit. However, he unexpectedly discovered that the devices had an adverse effect on the auditory senses of the Sea-dragons. Consequently, he attempted to subdue the Dragon Lords by deploying the jammers against their mounts. Ultimately, Han Solo and Luke Skywalker intervened, dismantling the jammers and enabling the dragons and Dragon Lords to triumph over Quarg.