I hear a high-pitched chirping noise when driving around 37 mph. If I reduce or increase the speed, you can't hear it; it is only around 37 mph. It sounds like it is coming from the front right, under the hood, area. I took it to the dealership and they couldn't determine the cause. They said it could be the serpentine belt or brake pads rubbing against the rotors, but the brake pads are half intact according to the second expert who saw them and showed them to me. But I did replace the serpentine belt and the chirping continues. Any ideas? Thank you.