Congratulations on your new car!
The 2005-2010 models with active noise cancellation(ANC) had a problem when the audio system was fiddled with in certain ways. I think 2011s have a similar system, so it could be that it was causing that sound.
There is a radio diagnostic mode on the 05-10 models that let's you temporarily disable the ANC to test. Don't know what it is for the 2011...
If you search for ANC noise you will see that some folks found a way to permanently disable the ANC to prevent it, buy again for 05-10 models.
Nicolas
The 2005-2010 models with active noise cancellation(ANC) had a problem when the audio system was fiddled with in certain ways. I think 2011s have a similar system, so it could be that it was causing that sound.
There is a radio diagnostic mode on the 05-10 models that let's you temporarily disable the ANC to test. Don't know what it is for the 2011...
If you search for ANC noise you will see that some folks found a way to permanently disable the ANC to prevent it, buy again for 05-10 models.
Nicolas