I recently noticed a noise with my vehicle as well. It sounds like wind blowing on the window pane at home. Like a faint turbo woosh. I first noticed it with the stereo on. i turn the stereo off. still heard it. checked that all my windows were closed. still heard it. then it went away. one of my co-workers suggests its a bad 'ground wire' with the stereo. I also experienced this noise when I had my bass tube installed. when my ipod would be plugged in and had the stereo on aux with no muic playing it would sound like a turbo when i got on the accelerator. If you have any aftermarket stereo equipment installed I'd check the wiring.

 

I hear a noise similiar to this as well, I have an 06 6spd sport. It makes a whine noise in gear when gas is depressed, just like an air sound. It is sometimes intermittent.

 

Have you checked to see if anything is obstructing the airbox?

 

check the upper plenum bolt all of it make sure they are tight and intake bolt. i had same issue after retight all the bolt on intake and plenum noise gone.

 

I noticed this same rushing air "superchargerish" sound today. It was pretty loud even when the radio was on. I pulled out into traffic and it started around 3.5 to 4k rpm. then i flipped it into neutral and rev'd to 4k and it made no noise. It only happens when there is strain on the engine i guess. Did anyone else fix the problem by doing something mentioned in the thread?