The whole point of demanding that cars make some sound is so that they are identified as cars. Custom sounds as in custom ringtones would totally thwart that concept. What EVs need to sound like is those early inverter drive forklift trucks. A sound like no other, not obtrusive but a bit scary
It's bad enough having to listen to all the ridiculous ringtones at work. I surely wouldn't want to hear a constant barrage of random sounds from vehicles. There would always be the small percentage of people who would have to get stupid and try spoken phrases, sirens, chickens, etc. As long as there are humans involved, it has to be strictly controlled.
I'd start here... (http://www.nhtsa.gov/About+NHTSA/Press+Releases/DOT+Proposes+New+Minimum+Sound+Requirements+for+Hybrid+and+Electric+Vehicles)... There is at least a contact atop the release.
But more likely is the Federal Register: https://www.federalregister.gov/.
Let us know what you find out!
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.