Ecological backlash
It is the alternator....
electrical interference
Could be the resonator
not enough oil usually
possibly your wheel bearing is on its way out
Bearing in blower motor?
Stereo interference?
Alternator is defective and needs replacing.
There is nothing more powerful to 'break a mother's back' than whining - and children know it! Pediatric psychologists feel that whining is a sign of immaturity, spoiling, or insecurty. More likely, it persists because it gets the child what she wants. Whining usually peaks at age 3 years old.
backlash
The Diff oil ir either needing changed or topped up, if its a whining noise that is.