This Innovative Billboard Uses Noise Pollution to Charge Electric Cars

Peugeot and BETC 'recycle' city sounds

While it can be a bit unnerving for pedestrians when a car whooshes by with little more noise than a passing breeze, the relative silence of electric cars is one of their best attributes. We’ve become so accustomed to the raucous clatter, sputter and grinding of combustion engines, we hardly even notice the sounds until they’re gone.