hum

Has anyone experienced a schrill and, sometimes, undulating hum when playing their Ipod????...especially at a louder volume when listening to a softer piece of music? This sound comes and goes but is there even when an aux. cable is plugged in w/o any device attached. No one here at the...

folks, i'm asking this question for my dad who has a 3.8l sapphire blue sedan and no internet access. when he is driving through a strong crosswind, on occasion he gets a humming noise inside the car. he said it sounds like someone blowing over the top of an empty coke bottle. his dealership...