Audi's e-tron hybrid Spyder at the 2010 Paris Auto Show
Audi's e-tron Quattro at the IAA 2009 auto show
Audi's e-tron Detroit concept, at the 2010 Detroit Auto Show
As electric cars take to the streets, the people at Audi have been confronted with what they see as a new problem to solve: their cars are too quiet. Acoustic technicians have been enlisted to find the new sound of Audi, and it won't be a roaring V8 or hissing turbo – the inspiration might just come from the sci-fi world.
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