Electric cars - silence is deadly?

Totally disagree, sound is crucial. Relying solely on sound, unless you're a bat, is not a good idea but equally we have forward facing binocular vision and cannot see everywhere at once. Sounds alert to things that happen outside the field of view.

thing is mate, in a city with lots of building and vehicles during rush hours, it can be diffcuilt for some to determinded certain sound, and in that close space, sound can be misleading coming from a different direction, you won't hear peds stepping out during a gridlock, you won't hear a bike messenger appearing out of nowhere, etc.

rely on your eyes more than your ears, not the other way round. (and I'm deaf, that how I know).