My daughter is extremely noise sensitive and can't handle the noise of those either. After a really rough 2 hour drive involving 3 gas station stops because she refused to even try to use one due to the auto-flushing toilet my wife suggested "making an app to track public bathrooms with air dryers and autoflushing toilets" and I've been debating if I want to start tagging every public bathroom I visit on Open Street Map with the toilet flush mechanism and existence of air dryers. And if i did so I'd probably also mark what changing table amenities are available and if there's more/less changing table amenities in the womens' or mens' rooms.