Why do all EVs make the same quiet hovering sound when they drive ?
In: Engineering
The humming sound is artificial. An EV is virtually silent if it’s driving slowly. This created a marked increases in slow speed pedestrian accidents, particularly when crossing blind alleys. Granted this could also be solved by people just paying attention when they cross the street but humans had generally gotten used to hearing some sound from an engine idling when a car was close. So they are now required to add a soft humming that plays whenever they are below a certain speed. Once you’re going more than like 20mph, the tires make enough sound that it’s not needed.
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