Ring My Bell

Oh, I am sure the birds will love that nonsense. Further explanation necessary can be found on Treehugger.

But really, isn't something both universally-recognized and thus powerful all that is necessary, even on a motorized conveyance? Could be simulated or not. Found that here.

Or is a very low-frequency warning actually necessary? This system does not seem to go too low... are they testing it with hearing-impaired persons, who can... feel the bass?

Speaking of dancing and older machines being more appropriate, here is some music for you.

Bottom line is that users of faster vehicles in both good and worse mixed-traffic situations (in Japanese cities cyclists generally have to share pavements with pedestrians) must never assume that they are noticed until they get the necessary body language. In Berlin many cyclists riding on pavements (generally illegal) who approach from behind communicate not a thing....