Whining noise at 2900rpm

[chemistone82]

I’d appreciate some advice. Thanks in advance. I have a high pitch whine above 2900 rpms. Here’s what I know so far

Definitely in the engine bay.
Alternator is charging at 14.1 V
It’s not the SAI system
Doesn’t seem to affect the running of the car

Any ideas what this could be?

98 2.5L 5 speed