If a silent vehicle is a problem, then there should be a required minimum noise level, and it should pertain to all cars, not merely to EVs.
I hate EV's being singled out for noisemaking...if it's REALLY a problem, then make the requirement apply to hybrids and quiet ICE cars. If not, then not.
2013 Ford Focus Electric 51000 miles in 34 months, returned
2014 Volt, returned
2014 Volt, returned,
1967 Corvette 427
1962 Corvette 327