Engine noise in hybrid and electric vehicles by Lotus Engineering

Engine noise in hybrid and electric vehicles are to be recreated with a new technology that is developed by Lotus Engineering.

This safe & sound technology is presently being proved in a Toyota Prius, which normally runs without much sound at low speed and also when it is in complete electric mode. This vehicle is welcomed by the blind and also those who are partially-sighted.
The synch makes use of a road speed sensor and a speaker mounted on the radiator and utters a noise at a representative pitch and frequency to procreate the noise of an engine decelerating down or accelerating up.

This allows a pedestrian to easily know how close the car is, and also its speed. The synthesizer repeatedly kicks in when the car moves into its total-electric mode, and turns off when the engine resumes.
‘Blind and partially-sighted people use the noise of oncoming traffic as a cue for when it is safe to cross the road’ and this engine noise will help them a lot.