The NHTSA traffic study that inspired this legislation and (also a related recommendation from an advocacy group for the blind) was unbelievably bad science.
They did not adjust their findings for the (well documented) geographic distribution of EVs and PZEVs. They compared national averages for gas cars with national averages for EVs - this is invalid methodology, because EVs are predominant in urban environments where pedestrian/car accidents are very much more common than rural environments where there isn't sufficient charging infrastructure to support EVs. When adjustments are applied, there is no difference between the rate of gas car and EV pedestrian/car accidents. Then, the study fantasizes an unsupported conclusion - having falsely concluded that EVs are more likely to run down pedestrians (they aren't) the NHTSA report authors then completely invent a rationale to explain this, with *no data to support that rationale*. It's just "EVs are quiet therefore the problem is EVs are quiet". Literally no falsing or experimentation whatsoever, just guesswork. Bad science.
As I understand this legislation, it purports to help the blind avoid quiet cars, but does not do that. It actually just penalizes the makers of EVs and PZEVs while allowing diesel and gasoline cars to be as silent as they wish, up to and including total silence.
However, there's nothing wrong with having noisemakers on EVs and PZEVs. It's just unfair to exempt pollutionmobiles from audio requirements, that's all. It's blatant market manipulation in favor of the Petroleum industry, targeted at Tesla, the only EV that doesn't already have a noisemaker.