Subtle High pitch whine?

[mcomet]

I have noticed recently that there is a high pitch whine sound when the engine is running. I hear it more when in my garage since it will bounce the sound off the walls, not loud enough to hear when driving. The best way I can describe it is like someone running a saw a few houses away. (When i first heard it i actually thought it was a neighbor runnung a table saw or trimming grass nearby).

I recently had the water pump replaced at my dealer and I am wondering if maybe the new pump could be the cause? Thoughts? I suppose I should get out of the car and try to figure where it is coming from.... I am hoping this doesn't mean the new pump is bad...although I would imagine it would be covered since it was recently done.