Sound from drivers floor area..

This may be hard to explain. After starting engine and placing in drive, after I release the brake pedal and start moving forward, there is an "engaging" type electronic noise that I hear from the floor area. Didn't notice it until recently, now it's driving me nuts! Almost sounds robotic. Just need to know what it is for my sanity, which may already be hopeless. Any ideas?

 

i don't know what it is, but it's there. not sure if it's same on 2010's but my 2011 has it. it almost makes sense though because it does sound like a brake booster engage/dissengage type sound...since that's one of the changes for 2011 (can't use two pedals at the same time type feature) i'm betting money it has something to do with that.

 

Thanks!