I think a good artificial noise for electric cars to generate, so they are audible enough for pedestrians and others to be aware of them nearby, would be the synths from Darude's Sandstorm.

@jackdaw_ruiz In all seriousness though, have you ever been in a parking lot or slow traffic when a car is approaching you from behind? What do you hear? It's not engine noise, even if it's a gas-powered vehicle, unless it's got straight pipes or they're revving their engine to deliberately make obnoxious noise. What you hear is tire noise, and at slightly higher speeds wind noise.

All the nonsense about "I got hit by an electric car because I couldn't hear it" is oil company propaganda.

@callisto

mmm electric cars are seriously like 1/10th the noise (obvs depending on variables at any moment like if it's accelerating or idling, etc...) and the difference ends up being are they loud enough to be noticeable above other ambient sound, or not?

like. I am posting this from a parking lot in Portland right now. EVs gliding past me as I type. the petro industry is godawful but asking someone to disregard their own sensory input and chalk it up to conspiracy is a fridge too far.

@jackdaw_ruiz OK, I'll concede your hearing is a lot more sensitive than mine (and I've been tested recently, my hearing is average or better for someone in their 60s). As a runner, I've MANY times had a standard gas powered car follow me politely on a narrow small town street, and I had no idea they were even there until they beeped. If I hear anything, it's always the tires.