That's already an issue with cars. Most EVs beep or sing or hiss quite loudly when you put them in reverse gear and at low speeds where tyre noise is low they have to augment with ICE and/or whining sounds to not be so silent and deadly. Especially the last few decades from the walkman to ipods to modern bluetooth headphones it's already been really important that vehicles make noise to warn pedestrians of their presence. Suddenly getting reversed on in a parking garage makes nobody happy.