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Loud, intense vibrating droning/bass noise - related to active noise control (ANC)?

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2.1K views 6 replies 4 participants last post by  moablvr  
#1 ·
Hello - I am experiencing an awful, dizzying bass-like sound on the highway around 1700rpm, and to a lesser degree at idle and startup. Based on some research (see these threads: Link here and also in this thread here), it seems to stem from a glitch/defect in the ANC system.

A number of suggestions are to tape over or disconnect 1 or all 4 of the ANC mics in the car. The first thread I linked mentioned a couple TSB bulletins (related to amp updates) from FCA that may address this issue.

Has anyone here experienced this and come up with a definitive fix? The sound is absolutely debilitating at highway speed, and I am desperate for a fix. Is there a thread I missed here?
 
#4 ·
2023 GC Limited with the standard radio. I replaced the stock door speakers with Kicker 3-way speakers and began experiencing the loud droning sound at odd times. This morning was the first chilly morning (40 degrees f) and the droning consistently repeated itself every time I stopped while driving and would only go away if, while driving, I would briefly floor the accelerator. After reading the thread about taping the ANC mikes, I put blue painter's tape over the two rear microphones and that seemed to have ended the problem. I will give this "fix" a try for the next couple of days and, if the droning sound does not recur, I will look at a more permanent fix unless I can find anything that shows that Jeep has acknowledged the problem with a real fix. I just bought this car in August and love everything about it except this single issue.
 
#7 ·
Updating my previous post about taping over the ANC microphones. After having no further problems with the system after putting painter's tape over all four of the microphones, I bought some vinyl tape that matches the color of my headliner and the microphones to replace the painter's tape. Have had no trace of the loud droning noise since taping over the microphones, so I'm satisfied that there is no need to try to attack any of the wiring or the microphones since the vinyl tape works perfectly and is unnoticeable without deliberately looking for it.