i get the same noise.. but it is closer to the fuel injection than the tranny..
i thought it was some sort of air leaking that is making the noise..
high pitch whistle.. weeeeeeeeeeeeeeeeeeeeeeee something like that..

1996 accord lx..

can it really be the alternator?? i started to hear it when i changed out the coolent temp sensor and the coolant belt the small one underneath the distributor.. before that there was no noise.. it is a feint whistle..