Depending on the year model of the car, it might not make that sound. It wasn’t required on some of the earlier EVs, which could be eerily quiet. I believe it’s required by law on newer models. Pre-2016 Volts has a “pedestrian horn button”; 2016 and newer Volts play a noise continuously as lower speeds. (My Uncle says it sounds like the warp drive hum on the original Star Trek Enterprise.)
Depending on the year model of the car, it might not make that sound. It wasn’t required on some of the earlier EVs, which could be eerily quiet. I believe it’s required by law on newer models. Pre-2016 Volts has a “pedestrian horn button”; 2016 and newer Volts play a noise continuously as lower speeds. (My Uncle says it sounds like the warp drive hum on the original Star Trek Enterprise.)