My car makes a hissing/squealing sound when I press on the accelerator.

What is your question?

I just changed my alternator and serpentine belt thinking that it was the problem, but the sound is still there. I' am also in the process of changing the power steering belt in hopes that it will alleviate the problem. I was also told that the sound could be coming from the brake sensor being to close to the brake rotors. This puzzles me because the sound only occurs when I' am accelerating. This sound is frustrating me, because it is becoming to expensive to alleviate the problem. I pray that someone can provide me with answers to fix what is making the noise on my car.