Question: why are some farts louder than others?
Answer: And the expulsion velocity—or how fast the air is exiting your body—plays a role, too. If the air is coming out faster, your fart would be more likely to sound louder. Plus, if swallowed air is triggering your fart—as is the case in the majority of farts—they tend to be louder (but less smelly), says Dr. Rice.