I have a 2007 Passion it just started to make a noise seems like its in the car speakers? Radio is off. stepping on gas pedal, going around a curve, stopping its not always happening but very annoying. after test driving and looking for something loose. has nothing to do with suspension. when parked makes the same noise when key is turned off, when using window button with window up and trying to put up with button makes the same noise??? I m at a lose??? Runs great only has 30 thousand miles o n it like new.