Sonic rifle
From MediaWiki
Sometimes, instead of having his sonic weaponry built into his superstructure, Rumble sports a Sonic rifle to perform his sound-based attacks. It emits a high-pitched whine.
Fiction
Highway Clash
Rumble used his sonic rifle against both the Autobots Optimus Prime and Prowl and you. In one possible scenario, Rumble used the weapon to send soundwave rippling towards you through the earth. Thankfully, you were standing near the Druid Stone. The stone's mysterious powers reflected the ripples back towards the Decepticon, leaving you unharmed while Rumble was sent hurtling through the air. Highway Clash
