I just need to know if it is normal or not for my car to be making this noise.

When I start hustling the car (accelerating fast/turning hard) it starts making a whining noise. When I'm stopped it is a low pitch, then when I accelerate it gets steadily higher pitched, then when I turn it gets very loud. At first i thought it was the computer boosting the power steering (I read the comp gs do that to give you more steering feel), but when I'm not on the gas (while turning) it doesn't make that sound at all.... please help!