Very Noisy Compressor on Air Conditioner

We have had our 2005 Freestar back to the dealer three times now to have them checkout the extremely loud noise from the compressor each time it kicks on. They keep telling us that it is normal and that in 2005 Ford put some type of extra fan or compressor system on the engine which causes it to be slightly noisy. This does not seem right to us. We've been driving Fords since 1969, owned many over the years, and this is the first time we've ever experienced this problem. It is so noisy that when we stop at a stoplight, we've had people look over at us as if wondering what was wrong with our car. Our daughter and son-in-law and family borrowed our Freestar to drive from Ohio to Michigan a month or so ago and the first thing they commented on to us was how noisy the compressor was. We are wondering if anyone else is experiencing these same problems?? Please contact us at lanov@sbcglobal.net as we would be very interested to hear your feedback.