I would cut the speaker wire
One of the benefits of EV cars for the driver and passenger(s) is the LACK of annoying engine noise. I'm sorry, but visually-impaired people have no business walking in the street without a guide dog or some high-tech help. Likewise, jogging in the street, especially while listening to music, is something you do at your own risk. And, as pointed out above, if drivers obey residential speed limits and pay attention there's no need for sound. (Exception: I would add a back-up sound to every car that doesn't have a back-up camera.)