The proposal, originally put forward in December 2011, is the first alteration of vehicle noise limits since 1995, and also sets a 4dB cut in engine noise for conventionally powered passenger cars claimed to cut noise pollution by 25%. Vehicles will also soon have to have a noise level label at the dealership.

Following a five-year transitional period during which time manufacturers have the option to fit the technology, an Acoustic Vehicle Alerting Systems (AVAS) will be mandatory all electric and hybrid vehicles, stipulating a minimum noise level while driving at less than 12mph (20kph) without an internal combustion engine.

The alert must not be an alarm-type sound, cannot be louder than a conventional drivetrain, should vary to indicate vehicle speed and can have a switch allowing them to be deactivated, provided the latter also shows a warning for the driver.

AVAS-type systems are already fitted to some electric vehicles, including the Renault ZOE which allows drivers to choose between three different sounds emitted below 18mph.