What do sound and noise in a vehicle have to do with conversing fuel? Ford engineers were presented with a tricky problem when they were designing the 2013 Fusion Hybrid: in order to achieve maximum fuel efficiency, the engine had to be tuned in a way that produced undesirable powertrain noise for the passengers.
Thankfully for your ears, they created an innovative solution to the dilemma in the form of Active Noise Cancellation technology. This technology works by canceling out undesirable, low-frequency sounds that the optimal engine tuning produces at lower speeds.