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Some more recent info from Jeep website:
If you reviewed the JL Wrangler Order Guide and the updated JLU Wrangler Order Guide we just posted, you'll notice there's now something called Active Noise Control listed under the Electronic Infotainment Sys Group and Alpine Premium Audio System option.
This feature is likely to operate like the "Active Noise Cancellation" function in the Jeep Gand Cherokee and Chrysler Pacific which uses the audio system and strategically placed microphones (four in the Grand Cherokee and Pacifica) to introduce opposite-wave sound to the cabin in order to offset unwanted sounds, leading to a quieter cabin (by reducing NVH).
In the Jeep Grand Cherokee Summit and SRT models, the Active Noise Cancellation system also offsets exhaust drone by creating counteracting sound waves to keep the vehicle quieter at highway speeds.
Here's a technical overview of how it operates in the Jeep Grand Cherokee:
The Active Noise Control (ANC) module performs the creation of signals appropriate to cancel engine order related vehicle noises from the engine. It creates these signals in proportion to the Engine RPM plus any other needed input.
Finally, besides a quieter cabin, two extra benefits of the noise cancelling feature is that it allows engineers to achieve more fuel-efficient engine calibrations due to the reduced need for NVH related tradeoffs, as well as reducing the need for heavy acoustic-damping material that add unwanted weight.
On the Jeep website, it's listed under Features, Interior, about 1/2 way down the page.
It seems to only be in the Alpine Package, and not dependent on any specific Infotainment system. It also includes a special laminated windshield (one that I hope is more resistant to rock impacts than the JK. )
BREAK THE SOUND BARRIER
The All-New Wrangler offers an available Alpine® Premium Audio System with a 552-watt 12-channel amplifier, eight speakers and a rear subwoofer. The system is enhanced by active noise cancellation and acoustic laminated windshield glass.
If you reviewed the JL Wrangler Order Guide and the updated JLU Wrangler Order Guide we just posted, you'll notice there's now something called Active Noise Control listed under the Electronic Infotainment Sys Group and Alpine Premium Audio System option.
This feature is likely to operate like the "Active Noise Cancellation" function in the Jeep Gand Cherokee and Chrysler Pacific which uses the audio system and strategically placed microphones (four in the Grand Cherokee and Pacifica) to introduce opposite-wave sound to the cabin in order to offset unwanted sounds, leading to a quieter cabin (by reducing NVH).
In the Jeep Grand Cherokee Summit and SRT models, the Active Noise Cancellation system also offsets exhaust drone by creating counteracting sound waves to keep the vehicle quieter at highway speeds.
Here's a technical overview of how it operates in the Jeep Grand Cherokee:
The Active Noise Control (ANC) module performs the creation of signals appropriate to cancel engine order related vehicle noises from the engine. It creates these signals in proportion to the Engine RPM plus any other needed input.
- The ANC module obtains the engine RPM from the vehicle Powertrain Control Module (PCM).
- The signals that the ANC module creates includes at least four simultaneous signals equivalent to sine wave frequencies in designated ratios tracking the engine RPM, to cancel engine order related noises, plus other optional signals that can enhance the cancellation effect.
- To maintain the effectiveness of the noise cancellation over the full range of vehicle operating conditions and seating locations, the ANC module has four outputs and process signals from four microphone assemblies located in the headliner.
- The ANC module supports mixing the four ANC signals into any output channel at a point after all of the signal processing required
- The ANC module operates on vehicle battery power and has its state of operation controlled by CAN-B bus messages.
- In addition to performing active noise cancellation, the ANC module supplies power to the loudspeakers.
Finally, besides a quieter cabin, two extra benefits of the noise cancelling feature is that it allows engineers to achieve more fuel-efficient engine calibrations due to the reduced need for NVH related tradeoffs, as well as reducing the need for heavy acoustic-damping material that add unwanted weight.
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