How do you know if ANC is working?

[Morenar]

Hello All,
I was wondering is there away other than less outside noise to know if active noise cancellation is working?

Thanks,

 

[Chuck19]

I think mine is starting to act up. Never had an issues until recently I have been noticing when decelerating that the drone is very loud around 1500 or so rpm so I think if you don’t hear the drone it’s working properly.

 

[Rupp]

What is this and do I have it? How do you know if you have this?

 

[MannymanX]

What is this and do I have it? How do you know if you have this?

If you have the Hemi, You have ANC.
Also, If you have 4 mics in the front of the headliner and 2 in the rear, you have it. If you only have 2 in the front, you don't have it.
The front 2 are for the multimedia system and the other 4 are for ANC.

 

[Scram1500]

Supposedly the ANC works even if the radio is turned off. You could connect a volt meter to the rear speaker output and see if there varying wattage when MDS kicks in. It's main purpose is to eliminate drone in the cab from the exhaust when the engine is only firing 4 cylinders