If you take a capful of Pepto Bismol it will put the kabosh on abdominal noises. Total silence, and forget the noise, pretty quickly. If you are taking antibiotics or other meds you can’t take the PB within 2 hours before or after. However if you work into that schedule 3-4 PB doses a day, it’s gonna be total silence from your belly. Problem solved.
If something is still making noises in there after a couple days of PB treatment it’s likely alien in origin because bacteria of this Earth does not survive those toxins. In that case you may want to call NASA because Houston may have a problem.
NB- PB will change the color of your stool and thicken it. So don’t be alarmed.