In an attempt to be more environment (and people) friendly, Domino’s Pizza changed their whole fleet of scooter to the electrical (quiet) ones.
That posed a problem and a challenge. Drivers would be more exposed to accidents as people wouldn’t be able to hear them approaching. And and the same time they wanted to increase awareness of their action.
That lead to a funny sound device that mimics the noise of an engine using the brand name. Just watch the short video.