Does it do it in neutral when you rev the engine up... if so it's the Power Steering pump...
A whinig or howling sound coming from a cars wheels means that a wheel bearing is bad and should be replaced.
possibly your wheel bearing is on its way out
electrical interference
not enough oil usually
it's the air intake taking more air and the belts moving faster
the wineing is probably the fuel injecters because that is what was wrong with my dads truck.
whining
A worn out clutch release bearing would cause a whining sound when you put your foot on the clutch.
What kind of howling? Or is it a whining? Where does it sound like it's coming from.
Your child in the backseat.
something may be rusty
The Doppler effect causes a change in sound because of the relative motion between the source of the sound and the observer. When the source is moving towards the observer, the sound waves are compressed, leading to a higher frequency (higher pitch). When the source is moving away, the sound waves are stretched, resulting in a lower frequency (lower pitch).