Why do quieter cars produce higher speeds?

Sounds like green spirit: the engine of the e-Golf *.

The acoustic engineers have developed characteristic sounds for each speed. In this way, the motor sound can adapt to the speed of the electric motor. How loud the e-Golf * sounds depends on its speed. In the car, a sound system brings the synthetic sound to life. The control unit for the system is installed in the radio slot behind the display, while the loudspeakers work in the engine compartment.

When the e-Golf * is stationary, nothing can be heard. After driving, the volume of the e-sound initially increases linearly and then remains constant between 10 and 30 kilometers per hour. At higher speeds it decreases again - beyond 50 kilometers per hour the loudspeaker remains silent. Because from 40 kilometers per hour, the rolling noises of the tires take on the main role in the sound. And the faster the e-Golf * drives, the higher the tone also travels.

If the road users have got used to the new sound of electromobility over time, there is nothing to be said against increasing the amount of electric sound in the future. The e-Golf * could have any sound imaginable and, for example, drive through the city with the sound of an airplane. But that is rather unlikely. Because in the end the sound not only has to sound like a car, it also has to match the vehicle - and with the e-Golf * that means above all: remaining environmentally friendly.