If it makes the same noise when you put on lots of other lecky things, then you are most likely looking at a slipping belt, could be aggravated by a very stiff alternator bearing.
If it does it only on the front screen, then look to see if it has a air bypass valve located on the bulkhead, this is often the case with front screens, if it has check it is connected at both ends, if one side is free to air then it will cause air to be sucked in when open/on, which would account for the noise.
tabetha