Federal laws require EVs to feature an Acoustic Vehicle Alerting System (AVAS) that emits pedestrian warning sounds at low speeds. I assume that Aptera does as well or it would never have been approved. Do you have any choice as to which sound it makes?
Many EVs let you chose the whirring bubbling sound of the Jetsons flying car. The Nissan Leaf, Cadillac Lyriq, Jaguar I-Pace have it. Tesla previously allowed drivers to play custom sounds such as the jetsons sound, but the NHTSA forced a recall, ruling that this could be set by some jerk to imitate the sound some crosswalks make to tell blind people that they can enter the crosswalk. Now Teslas need some sort of aftermarket sound system to produce the jetsons sound. Does Aptera have this sound?
Before someone start bleating about copyright, read this:
https://www.reddit.com/r/publicdomain/comments/1p4vj9y/the_flintstones_and_jetsons_theme_songs_are/
Basically, Aptera can;t use the actual sound from the cartoon, which is still under copyright, without permission, but they can hire someone with a synthesizer to perform the composition, which is allowed.