The noise is when the clutch pedal is out and only in 1st and 2nd gear at 4000 RPMs and when you are at wide open throttle. When the throttle is 1/4 or 1/2 or 3/4 open you don't hear it.

The acura dealer says it is a spring in my clutch that has come loose but the can't be sure unless they take my transmission out and charge me a min of $500, since the clutch isn't covered under warrenty.