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This noise you are talking about, does it seem like it's in the front of the engine? Does turning the AC on and off change it's pitch?
It sounds to me, like it could either be a ac compressor or the drive belt pulley. If the noise is only present when the AC is on, I would lean towards the compressor making the noise. If it's constant, and more pronounced when the AC is on, then it could be a belt pulley. I would look into those to items.
Hope this information helps. If you have any more questions, please feel free to ask. Thanks Jay!
The shaking I would think is a tire balance issue. The noise I would think is a possible compressor going bad, or a belt pulley. If I heard the noise, and was able to test drive your car, I would be able to find it easy, but over the net, it's harder and I can only give you a general location to check into. Thoughts are my thoughts on what I think your noise could be.
If you have any more questions, please feel free to ask.Thanks Jay!