[Dormant] Electric Vehicles

Pretty sure your answer is going to be no. The ONLY way to do this would be a horn or speaker system pointed forward like you mentioned which would have to be speed controlled, otherwise it would just be a constant siren of sorts. That being impractical and likely not well sought after, I dont think anything exists. Like other commenters have already said, scooters and such quiet, small displacement bikes dont have any noise enhancement and have never needed it- BUT they are primarily used in slower-speed city-type traffic, not out on higher speed highways and interstates (regardless of the actual speed of traffic flow when lane splitting is utilized).

I understand your concern, though. I used to commute daily on 2 wheels in the Bay Area on highways and on I-80 and people definitely could hear me and would move over when they could, and my bike isnt even “loud”- just a 900cc Triumph. Sometimes they wouldnt realize they were on the center line blocking progress and you could blip the throttle and then they’d notice and move over- something you wont be able to do on an electric bike, short of just beeping the horn i guess. It was a nice, reassuring feeling that you knew that THEY knew you were there. Not to mention i’ve been in a cage plenty of times and heard motorcycles well before ive seen them, so again…noise is justified.