AC noise question

[Kiasis]

When I turn on the AC, I get a noise that I can only describe as sounding like an exhaust leak. Seems to blow cold enough. Drops RPM a bit more than I'd like to see (don't know if the Camry has an AC idle-up VSV like my 88 Celica GTS).

Anyway, anyone have a guess as to what kinda leak/worn part/whatever might make a sound similar to an exhaust leak?

Thanks.

[Kep]

If an exhaust leak sounds like a chattering noise it may be the compressor itself on the way out. Raise the hood and listen while someone cycles the AC on and off. If it is the compressor it should be pretty obvious.

Kep