Well I have the larger set and they are a little loud, as in you could wear them out for a walk or to the supermarket but wouldn't want to wear them to a wedding or a day at church or elsewhere that they may be times without background noise. If you're worried, just wear shoes a little louder than the beads and people will think it's your walking that is causing the small sound.

I have worn them without getting any comments or looks, just take caution and think of what noise level you expect where you're going. Oh, and if you're already out and they're being noisy, just don't roll your hips when you walk. Staying stiller will help a lot!