pbahra writes One of the greatest emotional triggers at any auto-racing event is the noise. In Nascar, it is the earthshaking growl of V8 American muscle. In Formula One, it is the chest-rattling wail of 15,000 rpm. To some the sound is repellent. To others it is like an opera. But what if there is no sound at all? Welcome to the quiet world of Formula E, a global racing series for electric cars, which debuts this month in Beijing.