GMC Terrain Active Noise Cancellation Technology

Posted on 14 March 2011 by Tony Santos

2011 GMC Terrain Active Noise Cancellation

Are you annoyed by the noise made by your car? Interfering with your favorite music or even with your conversations with other passengers. Do you want a quiet and peaceful driving? Then you should consider buying GMC Terrain with Active Noise Cancellation system.

GMC Terrain’s new active noise cancellation technology enables it to deliver an EPA-certified fuel economy rating of 32 mpg in highway while providing a quiet driving.

GM engineers lowered the 6-speed transmission’s gear shift points of GMC Terrain to enable the Ecotec 2.4L four-cylinder engine to run at lower rpm torque. In doing so the torque converter clutch while GMC Terrain is at Eco mode, engages at lower engine speeds thus helping to preserve gas. This adjustment improves the  fuel efficiency by up to one mpg, but as a drawback it also creates a noise known as the low-end frequency boom. To counteract that noise, GMC engineers added a noise cancellation system that uses two microphones embedded in the headliner for detecting the hum and upon detection it will prompt an onboard frequency generator to create counteracting sound waves through the audio system’s speakers and sub-woofer canceling the effect of that noise.

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