A number of carmakers believe that a good solution would be the creation of an artificial sound.
Audi has recently released an official document that explains some details of this particular design process.
At the moment the company is testing new sounds which are based on the basic waveforms of internal combustion engines, but also include new sound components that could contribute to the car image.
As Audi Head of Acoustics Ralf Kunkel explains, the sonorities currently under development take inspiration from the spaceships featured in many sci-fi movies.
The Audi of the future will have a “new and unusual” sound, and the Audi RSQ from the Hollywood movie I, Robot gives an indication of how it might sound.
Below we report the official Press Release.
The sonorous sound of a six-cylinder engine; the silky murmur of a V8: the sounds of combustion engines are a constant of road traffic that everyone can associate with a car. With electric cars all that is passé because they are virtually silent up to a speed of 25 km/h (15.53 mph). The risk to others is obvious. There is only one logical conclusion for the sound technicians at Audi: The electric car of the future needs its own sound – but which one?
Up to this speed electric cars are virtually silent as they glide through the streets. Noise from the rolling of the tires and from the slipstream comes to the forefront above this speed, at which point an electric car is no longer significantly more quiet than a conventional vehicle.
The fact that this new form of transportation is particularly quiet is, of course, another factor of its success.
After all, environment-friendly automobiles should not only reduce emissions, but also noise pollution. However, speed without the typical road noises that serve as a signal harbors risks: The sense of hearing allows participants in traffic to monitor all 360 degrees of their surroundings, whereas the eyes only cover a limited angle. People with poorer vision or who are distracted can easily overlook a car.
Organizations for the blind worldwide therefore advocate giving quiet cars a unique sound; specifications or laws to this effect are already in place in the U.S.A. and Japan.
The sound technicians at Audi have long since taken up the task of protecting pedestrians in the electric mobility era.
“One way do this is by generating artificial noise in electric cars,” says Kunkel. The acousticians are currently hard at work on the sound design of the Audi e-tron. It is not just a matter of safety, but also a question of how the Audi of the future should sound.
“The obvious approach would be to work on the basis of the familiar sound of a combustion engine,” says Christian Schüller, Head of Brand Development/Corporate Identity.
“On the other hand, we want to underscore that an electric or hybrid Audi is an innovative product. We also want to make our Vorsprung durch Technik audible in the era of electric mobility.”
The rustling of leaves, the twittering of birds or shrill tones such as those used on snow cats are therefore not viable options.
However: “The sounds used for space ships in films are reminiscent of car sounds, yet are also very different, making this a rather interesting approach,” says Kunkel.
An Audi will not sound like an airplane with jet engines or a space ship from a science fiction film any time soon, though. “But the sound will be new and unusual. The Audi RSQ from the Hollywood film I, Robot gives an indication of how an Audi might sound in the future.”