With virtually no engine noise, electric vehicles are smooth and nearly silent. But is that a good thing? Some parents, and their children, would disagree.

According to research from Nissan, more than half of all the UK-based parents surveyed resort to hopping in their car with their restless children to help them get to sleep: A practice Nissan charmingly refers to as a “dream drive.” And Nissan is close to replicating this in otherwise-quiet electric vehicles.

[Read: A tricked-out Nissan Leaf just completed Britain’s longest fully autonomous drive]

“Combustion engines transmit a sound frequency, a combination of white, pink and brown noise varied in tone – creating an orchestral soundscape that is especially soothing and comforting to young children,” Nissan noise and vibration development manager Paul Speed-Andrews said.

With no internal combustion engine to produce those comforting vibrations and aural frequencies that can send a child to sleep in just minutes, EV drivers are at a bit of a loss.

“One of the biggest worries new parents have is how to get their baby to sleep. Parents soon realize that taking a drive in the car or ‘dream driving’ is a great way to get a baby or young child to nod off,” parenting expert Elizabeth O’Shea said.

Thankfully Nissan is on the case, and has dreamt up what it says is the world’s first “zero-emission lullaby” for electric vehicles.

In collaboration with sound designer and sleep coach Tom Middleton, Nissan has developed a soundscape that replicates the reassuring hum of internal combustion engines to, in theory, induce sleep in youngsters.

Credit: Nissan