['85 Audi 80] Alternator whine/noise

['85 Audi 80] Alternator whine/noise Hello. I recently noticed a weird whine, or noise, from the alternator on my car. it happends almost every ride for the entire time the engine is running, and is not affected by rpm or speed. Also, there isn't any effect on the performance. Its just the whine. What can th@ be?
10x