Thunderblast Bomb (Su)

Prerequisites: Alchemist 6, Bomb class feature. 

Benefits: When the alchemist uses a bomb, he creates a thunderous report. All creatures adjacent to the bombs splash area must succeed at a Fortitude save or be deafened for 1 minute. Any creature wielding or carrying the firearm takes a –4 penalty on this saving throw, and her misfire range increases by 1 for 1d4 rounds. If the firearm was loaded when it was targeted by this effect, that ammunition is wasted. If the creature fails its Fortitude save by 10 or more, it is also knocked prone.