I know that my 02rs makes a sort of "Electrical sound" when accelerating and decelerating. but this is the belts. It has done it when stock, and after i replaced my pulleys.
When the car was stock, and also when i only had an axleback exhaust i noticed a high pitched "Feedback" type noise, super high pitch, like a continuous dog wistle or something!! coming from the exhaust when the car was at idle. I dont believe i have noticed it since i have replaced the headers and midpipe.