GM shows off Terrain SUV with noise cancellation, says silence equals fuel efficiency — Engadget

GM claims its new Terrain has other SUVs beat when it comes to fuel efficiency, and they’re citing active noise cancellation — a concept near and dear to audiophiles everywhere — as one of the driving factors that puts it 4MPG above the competition. Basically, the Terrain’s enlisted a new one-touch “Eco mode” that allows its four-cylinder engine to run at a lower torque, decreasing engine speeds, and thus saving gas. The thing is, this increased fuel efficiency comes with a “low-end frequency boom,” which is where the noise cancellation sets in: two microphones built in to the car’s headliner detect the boom, prompting a frequency generator to pump counteracting sound waves through Terrain’s speakers. Simply put, GM’s just getting rid of an unpleasant hum. So a quieter car isn’t necessarily a greener car, but we’ll take a more fuel efficient SUV any day. If you’re picking up what GM’s laying down, check out the full PR after the jump.

via GM shows off Terrain SUV with noise cancellation, says silence equals fuel efficiency — Engadget.

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