You're not alone in not wanting to make the big splash with others listening. If it's a single toilet public bathroom, turn the water on to muffle your bathroom noises. If there are several stalls I bring in something paper I can crumple to mask the noise. It just sounds like I'm unwrapping a pad which is actually where I got the idea. You can also put a couple of big wads of TP in the toilet before you go that will muffle the splash. Just a few helpful hints, because, hey, when ya gotta go ya gotta go.