-Belt
A belt running one of the various components of your vehicle may be loose or in need of replacing/adjustment. Sometimes they simply get wet, and other times the tension pulley is out of adjustment. They slip on the pulley and cause the squealing until they regain traction. (Belts may run AC, water pump, alternators, engine fans etc)
The squealing sound you hear when your car brakes are wearing out is referred to as a "squealer." This indicator is a strip of metal that when the brake pad wears down makes contact with the rotor making a metal on metal noise.
usually loose belts.
Some manufactures use a wear indicator that causes a squealing sound when the pads need to be replaced.
The sound is most likely the brakes squealing. Check the pads to make sure that the metal part isn't cutting into the rotor.
If your car makes a squealing sound when you are turning it is because your brakes have worn out. When the brakes wear down below a certain point, a wire pops loose. That makes a squeaking sound.
It Could Be Your Serpentine Belt too tight or not tight enough.
Worn serpentine belt and/or belt tensioner.
Probably a worn or loose belt
you need to replace your belts. Take it to AutoZone to have them look at it
Cooling fan bearing?
Usually, it is your fan belt slipping due to moister. You can get a spray for it at your local auto store.
i would think that it may be a belt slipping. since it only happens when the car is moving/acelerating. perhaps one of your belts is loose and when you accelerate since the pulley moves faster the belt start slipping .also the splash shield behind the brakes rotors sometimes bend and you get a squealing type metalic sound. if is more of a humming sound it may be a wheel bearing .