Some do it some don't. You can tune the sound out, but that will take some time and filing on the wings and/or strut. Even some of the $4000 SkySki LE and LEXs do this.
Do you have the orginal Air Chair or Stealth? The orginal one is powder coated in black. If you have the powder coated one I would not suggest filing on it unless you are ready to strip the entire foil set.