In a recent shareholder's meeting, someone asked the question about EVs making sounds to alert pedestrians. Elon's response was profound. First, he mentioned that there are two schools of thought on it. Personally, I'm on the "no way" side of it; I think it's noise pollution with insufficient value added. But then Elon demonstrated his brilliance by suggesting a compromise solution that I think everyone, including myself, could get behind. He suggested that cars could make some kind of pleasant sound, but only when it detects people in the way, and he even suggested that the sound be directional. This would be brilliant as it would limit the noise to only when it has potential value, while remaining quiet the other 95+ percent of the time when it's just noise pollution. Personally, I don't think it would need to be directional, but if it can be, all the better.
The cost of such a system could be significant enough that it might not be a good idea for all cars, but it could be made an added cost option. I would pay quite a bit extra for it, myself.
I'm not sure at the moment what the current status of the legislation on this topic is. The last I read, the proposal for the legislation was that EVs make noise under 18 MPH. Hopefully, Tesla is actively paying attention to this and working to ensure any enacted legislation leaves room for companies like Tesla to provide intelligent solutions.
Everyone should continue to pay attention to this topic, as it is important to the future of the EV market. Help to keep awareness high on what's going on, and when possible, help steer this in a good direction. If handled correctly, this win-lose could be made into a win-win for everyone.